feat(phase4c): native SGP4 satpass — standalone satellite passes, no Central (#39)

meshai can now predict + broadcast satellite passes locally without Central.

Data plumbing (4c-1):
- env/tle_fetch.py: keyless Celestrak GP fetcher (GROUP/CATNR, FORMAT=tle) →
  upserts the existing sat_tles table via a shared upsert_tle() helper
  extracted into tle_handler (Central ingest refactored to call it, unchanged)
- observer_locations table (v23, SCHEMA_VERSION 22->23) + persistence helpers;
  seeded from SatpassConfig.observers in main._init_components
- SatpassConfig: observers, tle_groups, norad_ids, tle_refresh_seconds,
  min_elevation_deg, window_hours

Predictor + source-agnostic gate (4c-2):
- extracted gate_consolidated_pass(consolidated, *, now) from
  consolidate_satpass_pending: dedup-vs-satpass_events + rate cap + format_pass
  + deferred commit. Central path byte-identical (114 tests unchanged)
- env/satpass.py: native adapter predicts passes for each sat x observer via
  pass_predictor.compute_passes, consolidates IN-MEMORY per canonical hour
  bucket (earliest AOS / latest LOS / max-el observer supplies peak_compass +
  entry/exit observers), runs the shared gate, emits sat_pass. Commit rides
  event.data so satpass_events dedups across ticks — NO satpass_pending, NO
  Central-consumer timer dependency (works with Central off)
- registered in env/store.py gated on enabled and feed_source==native

32 new tests (tle_fetch 16, observer_locations 14... satpass_native 8, minus
overlaps); full suite 10-failure baseline (1672 passed).

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

work/tests/test_satpass_persisted_timer.py

@@ -98,12 +98,13 @@ def _ingest_envelope(norad_id=25544, observer="Boise", max_el=72.5,
 
 # ── schema / migration ───────────────────────────────────────────────
 
-def test_schema_version_is_22():
-    assert SCHEMA_VERSION == 22
+def test_schema_version_is_current():
+    # Bumped to 23 by the native-satpass observer_locations migration (v23).
+    assert SCHEMA_VERSION == 23
 
 
 def test_v22_migration_applies_and_adds_due_at_column(tmp_path, monkeypatch):
-    """Fresh DB migrates cleanly to v22 and satpass_pending has due_at."""
+    """Fresh DB migrates cleanly and satpass_pending has due_at (v22 column)."""
     from meshai.persistence import close_thread_connection
     from meshai.persistence import db as persistence_db
     db = str(tmp_path / "fresh-v22.sqlite")
@@ -112,7 +113,7 @@ def test_v22_migration_applies_and_adds_due_at_column(tmp_path, monkeypatch):
     close_thread_connection()
     conn = init_db()
     row = conn.execute("SELECT value FROM schema_meta WHERE key='version'").fetchone()
-    assert int(row["value"]) == 22
+    assert int(row["value"]) == 23
     cols = {r["name"] for r in conn.execute("PRAGMA table_info(satpass_pending)")}
     assert "due_at" in cols
     close_thread_connection()