[AZ-343] C2.5 InlierCountReRanker + shared FeatureExtractor helper

Implements the production-default ReRankStrategy: K=10 → N=3 by
single-pair LightGlue inlier count, with strict drop-and-continue
(INV-8) on per-candidate TileFetch / backbone / zero-inlier failures
and RerankAllCandidatesFailedError on zero survivors. Composition
root injects the shared LightGlueRuntime + Clock + the new
FeatureExtractor helper (an L1 placeholder OpenCvOrbExtractor that
unblocks AZ-343 and future C3 strategies — task scope expansion).

Architectural notes:
- Cross-component imports stay banned; tile_store types as `object`
  and the C6 TileCacheError family is duck-typed by class module
  prefix (same workaround AZ-348 adopted for c7_inference; proper
  fix is to relocate TileCacheError to _types/ in a follow-up).
- Clock injection follows the replay contract (AZ-398 Invariant 2);
  reranked_at is sourced from clock.monotonic_ns().
- AZ-342 factory grew `feature_extractor` + `clock` + `fdr_client`
  parameters; existing AZ-342 conformance tests updated.

Tests: 19 new AC-1..AC-12 + mixed-failure scenarios in
test_inlier_count_reranker.py; existing AZ-342 suite (26) still
green. Full repo sweep 1093 passed / 2 skipped (cmake/actionlint
not on PATH).

Co-authored-by: Cursor <cursoragent@cursor.com>

src/gps_denied_onboard/components/c2_5_rerank/config.py

@@ -37,10 +37,18 @@ class C2_5RerankConfig:
 
     ``top_n`` is the per-frame N cap (1..K-1). Default 3 (the epic's
     K=10 → N=3 spec).
+
+    ``debug_per_frame_log`` gates the two DEBUG events
+    (``c2_5.rerank.zero_inliers`` per dropped candidate and
+    ``c2_5.rerank.frame_done`` per frame); flooding journald at
+    ``3 Hz × K=10 = 30 events/sec`` by default would violate
+    description.md § 9. Operators flip this to ``True`` for the
+    debug-build flight binary.
     """
 
     strategy: str = "inlier_count"
     top_n: int = 3
+    debug_per_frame_log: bool = False
 
     def __post_init__(self) -> None:
         if self.strategy not in KNOWN_STRATEGIES: