fix(perception): reconstruct rolling occupancy from K1 increments

src/k1link/web/m4_threat_replay_api.py

@@ -14,8 +14,10 @@ from fastapi import APIRouter, HTTPException, Query
 
 from k1link.perception.threat_replay import (
     THREAT_REPLAY_FRAME_SCHEMA,
+    THREAT_REPLAY_FRAME_SCHEMA_V2,
     THREAT_REPLAY_RESULT_PREFIX,
     THREAT_REPLAY_VISUAL_SCHEMA,
+    THREAT_REPLAY_VISUAL_SCHEMA_V2,
     ThreatReplayError,
     ThreatReplayResult,
     read_threat_replay_result,
@@ -57,10 +59,11 @@ def build_m4_threat_replay_router(
         items: list[dict[str, object]] = []
         invalid_total = 0
         for candidate in candidates:
+            if len(items) >= limit:
+                break
             try:
                 frozen = result(candidate.name)
-                if len(items) < limit:
-                    items.append(_project_result(frozen))
+                items.append(_project_result(frozen))
             except HTTPException:
                 invalid_total += 1
         return {
@@ -149,7 +152,8 @@ def _cached_video_overlay(
     frames = []
     for expected_sequence, row in enumerate(_iter_jsonl(root / "frames.jsonl")):
         if (
-            row.get("schema_version") != THREAT_REPLAY_FRAME_SCHEMA
+            row.get("schema_version")
+            not in {THREAT_REPLAY_FRAME_SCHEMA, THREAT_REPLAY_FRAME_SCHEMA_V2}
             or row.get("sequence") != expected_sequence
         ):
             raise ValueError("M4.6 video frame order changed")
@@ -288,7 +292,9 @@ def _iter_jsonl(path: Path) -> Iterator[dict[str, object]]:
                 raise ValueError("M4.6 JSONL row is invalid")
             if value.get("schema_version") not in {
                 THREAT_REPLAY_FRAME_SCHEMA,
+                THREAT_REPLAY_FRAME_SCHEMA_V2,
                 THREAT_REPLAY_VISUAL_SCHEMA,
+                THREAT_REPLAY_VISUAL_SCHEMA_V2,
             }:
                 raise ValueError("M4.6 JSONL schema is invalid")
             yield value