chore: excise the dead Central NATS consumer path (-11,328 LOC) (#144)

* chore: excise the dead Central NATS consumer path

Central was retired and its database dropped 2026-07-15; its NATS broker no
longer exists. Verified against the live CT108 deployment: all 12 adapters
run feed_source=native, zero on central, and central.enabled is False
(default, never overridden). The consumer and its handlers were unreachable.

Removed:
- central/consumer.py and 6 dead handlers (nws, quake, swpc, nwis, avy,
  incident) -- their handle_* entrypoints were reachable only from the
  consumer's dispatch
- the Central wiring in main.py (init, guarded start, retry loop, stop path)
- the dead config surface: CentralConsumerConfig, EnvironmentalConfig.central,
  adapter_config ("central","severity_thresholds") and its display block
- the nats-py dependency (consumer.py was its only importer)
- 19 test files that exercised only the dead path

KEPT -- these live under central/ but are imported directly by native
adapters, and deleting them would break production:
- wfigs_handler.py: firms_handler._handle_pass_boundary() calls its _render()
  on the live FIRMS growth-fire path (env/firms.py -> ingest_hotspot_pixel)
- firms_handler, satpass_handler, tle_handler: split files whose handle_*
  entrypoints are dead but whose engines are live. Left intact; splitting
  them is separate work.
- pass_predictor, budget, idaho_gauge_sites: fully live.

The usgs_quake keys global_mag_floor / regional_mag_floor / regional_centroid
/ regional_radius_mi / broadcast_pager_alerts are NOT removed despite comments
labelling them "CENTRAL-PATH ONLY" -- notifications/gating/quake.py reads them
unconditionally in the native path. Those comments are corrected separately.

Test-count note: the suite drops ~425 tests. Most were migration PARITY tests
whose sole purpose was proving the native rewrite byte-matched the Central
handler (golden byte-parity, cross-source identity, gate-sequence replay).
With the handler deleted there is nothing left to compare against, so they
cannot exist. Native-only tests were kept and reworked where a test reached
for a central symbol incidentally. This is a real coverage loss, accepted
deliberately: the parity harness proved the refactor faithful, and git
history preserves the originals.

Suite: 1984 passed, 6 failed -- the same 6 pre-existing failures as main
(stale SCHEMA_VERSION x3, expired TLE fixtures x2, one order-dependent),
all being fixed on fix/green-test-suite. No new failures.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* test(nws): restore native-only golden coverage for the wire formatter

Commit ca751fb5 deleted the Central nws_handler parity harness along with
the handler itself, which took the ONLY tests that pinned formatters.nws
.format()'s literal wire output. Gate-sequence and schema-conformance
tests already survived natively; the formatter's actual rendered text did
not have any native-only regression net.

Add TestFormatterGolden to test_nws_refactor.py: 3 real-fixture cases plus
6 hand-built pathological cases mined from the deleted test_nws_handler.py
(SVR path-sampling, the "no dangling separator" regression, TOR on-ground
vs radar-indicated, FFW flood-cause detection). Every literal was verified
by temporarily restoring the pre-excision central.nws_handler._render()
from git history (ca751fb5^) in a throwaway, uncommitted script, confirming
byte-identical output against the current native format() for all 37 real
fixtures (nws/ + nws_last/) and all 9 pathological cases, then pinning the
confirmed-matching string as the literal -- not a blind snapshot of
current behavior.

quake/swpc/avalanche/hydro/incident/fire were checked and already carry
equivalent native-only golden coverage (added directly in ca751fb5), so no
changes were needed there.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Matt Johnson <mj@k7zvx.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

work/tests/test_adapter_config_api.py

@@ -208,11 +208,16 @@ def test_put_json_accepts_list(client):
 
 
 def test_put_json_accepts_dict(client):
+    # central/severity_thresholds was removed with the Central handler path;
+    # any surviving "json"-type key accepts dict values equally (the API
+    # only checks JSON-serializability, not shape) -- use reminders_wfigs/
+    # terminate_when (default is a list) to exercise the dict-value path.
     r = client.put(
-        "/api/adapter-config/central/severity_thresholds",
+        "/api/adapter-config/reminders_wfigs/terminate_when",
         json={"value": {"routine_max": 0, "priority_max": 1, "immediate_min": 2}},
     )
     assert r.status_code == 200
+    assert r.json()["value"] == {"routine_max": 0, "priority_max": 1, "immediate_min": 2}
 
 
 def test_put_json_accepts_none(client):
@@ -291,8 +296,8 @@ def test_list_meta(client):
     body = r.json()
     assert "wfigs" in body
     assert body["wfigs"]["include_in_llm_context"] is True
-    # central / geocoder default to False
-    assert body["central"]["include_in_llm_context"] is False
+    # geocoder defaults to False (central adapter meta was removed with the
+    # Central handler path)
     assert body["geocoder"]["include_in_llm_context"] is False