fix(2-B): normalize WFIGS field formats

WFIGS returns ISO 3166-2 state codes (US-MT) and 2-letter incident
type codes (WF, RX). Normalize at parse boundary:

- normalize_state: strips US- prefix (US-MT -> MT)
- normalize_incident_type: maps codes to names (WF -> wildfire)

Fixes:
- category was fire.incident.wf, now fire.incident.wildfire
- region was US-US-MT-GLACIER, now US-MT-GLACIER

Both raw and normalized values stored in event.data.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/central/adapters/wfigs_common.py

@@ -17,6 +17,35 @@ WFIGS_PERIMETERS_URL = (
 # Fall-off sweep window: 14 days (matches WFIGS's longest fall-off: large fires)
 FALLOFF_WINDOW_DAYS = 14
 
+# Incident type code mappings (WFIGS uses 2-letter codes)
+INCIDENT_TYPE_MAP = {
+    "WF": "wildfire",
+    "RX": "prescribed_fire",
+    "CX": "complex",
+    "FA": "false_alarm",
+}
+
+
+def normalize_state(state: str | None) -> str | None:
+    """Strip 'US-' prefix from POOState (ISO 3166-2 -> 2-letter)."""
+    if not state:
+        return None
+    if state.startswith("US-") and len(state) == 5:
+        return state[3:]
+    if len(state) == 2:
+        return state
+    return state  # unknown shape, pass through
+
+
+def normalize_incident_type(code: str | None) -> str:
+    """Map IncidentTypeCategory code to a readable name."""
+    if not code:
+        return "unknown"
+    upper = code.upper()
+    if upper in INCIDENT_TYPE_MAP:
+        return INCIDENT_TYPE_MAP[upper]
+    return code.lower()
+
 
 def severity_from_acres(acres: float | None) -> int:
     """Map DailyAcres to severity level 0-4."""
@@ -42,6 +71,7 @@ def build_regions(state: str | None, county: str | None) -> tuple[list[str], str
     """
     Build geo.regions list and primary_region from POOState and POOCounty.
 
+    Expects normalized 2-letter state codes (e.g., "MT" not "US-MT").
     Returns (regions, primary_region).
     """
     if not state:
@@ -62,6 +92,7 @@ def subject_suffix(state: str | None, county: str | None) -> str:
     """
     Build subject suffix from state and county.
 
+    Expects normalized 2-letter state codes.
     Returns lowercase state.county (county with spaces→underscores).
     Falls back to "unknown" if state is not available.
     """

src/central/adapters/wfigs_incidents.py

@@ -25,6 +25,8 @@ from central.adapters.wfigs_common import (
     extract_centroid,
     get_observed_guids,
     init_observed_table,
+    normalize_incident_type,
+    normalize_state,
     parse_wfigs_timestamp,
     point_in_bbox,
     severity_from_acres,
@@ -185,6 +187,7 @@ class WFIGSIncidentsAdapter(SourceAdapter):
             return f"central.fire.incident.removed.{state}"
 
         # Regular incidents: central.fire.incident.<state>.<county>
+        # POOState is already normalized (2-letter code)
         state = event.data.get("POOState")
         county = event.data.get("POOCounty")
         suffix = subject_suffix(state, county)
@@ -273,17 +276,22 @@ class WFIGSIncidentsAdapter(SourceAdapter):
                 ):
                     continue
 
-            # Track this GUID as observed (for fall-off detection)
-            state = props.get("POOState")
+            # Normalize at parse boundary
+            state_raw = props.get("POOState")
+            state = normalize_state(state_raw)
             county = props.get("POOCounty")
+            incident_type_raw = props.get("IncidentTypeCategory")
+            incident_type = normalize_incident_type(incident_type_raw)
+
+            # Track this GUID as observed (for fall-off detection)
+            # Store normalized state for consistency
             current_guids[irwin_id] = (state, county)
 
             # Parse fields
-            incident_type = props.get("IncidentTypeCategory", "unknown").lower()
             discovery_time = parse_wfigs_timestamp(props.get("FireDiscoveryDateTime"))
             daily_acres = props.get("DailyAcres")
 
-            # Build regions
+            # Build regions (expects normalized 2-letter state code)
             regions, primary_region = build_regions(state, county)
 
             # Build geo
@@ -297,7 +305,7 @@ class WFIGSIncidentsAdapter(SourceAdapter):
             else:
                 geo = Geo(regions=regions, primary_region=primary_region)
 
-            # Build event
+            # Build event with normalized values in data
             event = Event(
                 id=irwin_id,
                 adapter=self.name,
@@ -308,12 +316,14 @@ class WFIGSIncidentsAdapter(SourceAdapter):
                 data={
                     "IrwinID": irwin_id,
                     "IncidentName": props.get("IncidentName"),
-                    "IncidentTypeCategory": props.get("IncidentTypeCategory"),
+                    "IncidentTypeCategory": incident_type,
+                    "IncidentTypeCategory_raw": incident_type_raw,
                     "DailyAcres": daily_acres,
                     "PercentContained": props.get("PercentContained"),
                     "FireDiscoveryDateTime": props.get("FireDiscoveryDateTime"),
                     "ModifiedOnDateTime": props.get("ModifiedOnDateTime"),
                     "POOState": state,
+                    "POOState_raw": state_raw,
                     "POOCounty": county,
                     "raw": props,
                 },

src/central/adapters/wfigs_perimeters.py

@@ -25,6 +25,8 @@ from central.adapters.wfigs_common import (
     extract_centroid,
     get_observed_guids,
     init_observed_table,
+    normalize_incident_type,
+    normalize_state,
     parse_wfigs_timestamp,
     polygon_intersects_bbox,
     severity_from_acres,
@@ -185,6 +187,7 @@ class WFIGSPerimetersAdapter(SourceAdapter):
             return f"central.fire.perimeter.removed.{state}"
 
         # Regular perimeters: central.fire.perimeter.<state>.<county>
+        # POOState is already normalized (2-letter code)
         state = event.data.get("POOState")
         county = event.data.get("POOCounty")
         suffix = subject_suffix(state, county)
@@ -271,18 +274,23 @@ class WFIGSPerimetersAdapter(SourceAdapter):
                 ):
                     continue
 
-            # Track this GUID as observed (for fall-off detection)
-            state = props.get("attr_POOState")
+            # Normalize at parse boundary
+            state_raw = props.get("attr_POOState")
+            state = normalize_state(state_raw)
             county = props.get("attr_POOCounty")
+            incident_type_raw = props.get("attr_IncidentTypeCategory")
+            incident_type = normalize_incident_type(incident_type_raw)
+
+            # Track this GUID as observed (for fall-off detection)
+            # Store normalized state for consistency
             current_guids[irwin_id] = (state, county)
 
             # Parse fields using prefixed names
-            incident_type = props.get("attr_IncidentTypeCategory", "unknown").lower()
             discovery_time = parse_wfigs_timestamp(props.get("attr_FireDiscoveryDateTime"))
             # Use poly_GISAcres or attr_IncidentSize for acreage
             daily_acres = props.get("attr_IncidentSize") or props.get("poly_GISAcres")
 
-            # Build regions
+            # Build regions (expects normalized 2-letter state code)
             regions, primary_region = build_regions(state, county)
 
             # Extract centroid for geo
@@ -320,13 +328,15 @@ class WFIGSPerimetersAdapter(SourceAdapter):
                 data={
                     "IrwinID": irwin_id,
                     "IncidentName": props.get("attr_IncidentName") or props.get("poly_IncidentName"),
-                    "IncidentTypeCategory": props.get("attr_IncidentTypeCategory"),
+                    "IncidentTypeCategory": incident_type,
+                    "IncidentTypeCategory_raw": incident_type_raw,
                     "DailyAcres": props.get("attr_IncidentSize"),
                     "GISAcres": props.get("poly_GISAcres"),
                     "PercentContained": props.get("attr_PercentContained"),
                     "FireDiscoveryDateTime": props.get("attr_FireDiscoveryDateTime"),
                     "ModifiedOnDateTime": props.get("attr_ModifiedOnDateTime_dt"),
                     "POOState": state,
+                    "POOState_raw": state_raw,
                     "POOCounty": county,
                     "geometry": geometry,  # Full GeoJSON polygon
                     "raw": props,