clearance: act on drb-correlation-review of f0a88d4

Review of the first clearance fix found it pushes toward early resolve:
- parser cleared units on questions ("45-9, are you clear?"), negations
  ("not clear yet"), orders ("clear the scene", "clear to transport"),
  places/times ("Room 2 clear", "1400 hours, clear") and split "45 9" into
  unit 45. Now rejects "?", not/is/are/you, anything after the status word
  but sign-offs, place/time words; joins "45 9" -> "45-9".
- a clear from a unit never active on an incident was recorded in
  units_cleared and could pass the all-clear gate. Only units actually
  active there can clear there now.
- clearance-only calls skip the LLM tier (same as thin calls): only the
  rules engine's unit match can say which incident a 10-8 belongs to.
- replay incident view carries srcaddr/srcaddrs for the radio-ID clearance
  investigation.

Replay 09-22 10:00-12:00 ET with f0a88d4: real clears 0 -> 2 (both LLM
closure), unit clears still 0 — the parsed clears are right but those
units were never recorded as assigned (Whisper mangles unit IDs at
dispatch), which this commit does not fix.

c2-core: 465 pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

drb-c2-core/app/internal/intelligence.py

@@ -490,24 +490,44 @@ _CLEAR_WORD_RE = re.compile(
 )
 _TEN_CODE_TOKEN_RE = re.compile(r"^10-?\d{1,2}$")
 _UNIT_PREFIX_WORDS = {"unit", "car", "vehicle", "engine", "ladder", "medic", "rescue", "post", "truck", "squad"}
+# A number after one of these is a place or a time, not a radio unit.
+_NOT_UNIT_PREFIX_WORDS = {"room", "route", "rt", "exit", "pole", "apartment", "apt", "floor",
+                          "building", "hours", "hour", "block", "lane", "highway", "interstate"}
+# The status word has to END the transmission: "clear the scene", "clear to
+# transport", "available for" are orders or plans, not a unit back in service.
+_TRAILING_OK = {"10-4", "thanks", "thank", "you", "k", "over", "now", "again", "from", "headquarters", "hq",
+                "central", "dispatch"}
 
 
 def _short_clearance_unit(transcript: str) -> Optional[str]:
-    m = _CLEAR_WORD_RE.search(transcript or "")
+    text = (transcript or "").strip()
+    if not text or "?" in text:
+        return None  # "45-9, are you clear?" asks; it doesn't report
+    m = _CLEAR_WORD_RE.search(text)
     if not m:
         return None
-    before = [t.strip(".,;:!?") for t in transcript[: m.start()].split()]
+    before = [t.strip(".,;:!") for t in text[: m.start()].split()]
     before = [t for t in before if t]
+    after = [t.strip(".,;:!").lower() for t in text[m.end():].split()]
+    if any(t and t not in _TRAILING_OK for t in after):
+        return None
+    if any(t.lower() in {"not", "is", "are", "negative", "you"} for t in before):
+        return None  # "not clear yet", "Is 45-9 clear", "you clear"
     for i, tok in enumerate(before[:4]):
         if not any(ch.isdigit() for ch in tok) or _TEN_CODE_TOKEN_RE.match(tok):
             continue
-        prev = before[i - 1] if i else ""
-        if prev.lower() in _UNIT_PREFIX_WORDS:
-            return f"{prev} {tok}"
+        prev = before[i - 1].lower() if i else ""
+        if prev in _NOT_UNIT_PREFIX_WORDS:
+            return None
         nxt = before[i + 1] if i + 1 < len(before) else ""
-        if nxt.isalpha() and nxt.lower() not in {"i'm", "im", "is", "are", "to", "we're", "copy"} \
-                and nxt[0].isupper():
-            return f"{tok} {nxt}"  # "11 Adam, clear"
+        if nxt.lower() in _NOT_UNIT_PREFIX_WORDS:
+            return None  # "1400 hours, clear"
+        if nxt.isdigit():
+            tok = f"{tok}-{nxt}"  # "45 9 clear" is unit 45-9, not unit 45
+        elif nxt.isalpha() and nxt[0].isupper() and nxt.lower() not in {"i'm", "im", "we're", "copy"}:
+            tok = f"{tok} {nxt}"  # "11 Adam, clear"
+        if prev in _UNIT_PREFIX_WORDS:
+            return f"{before[i - 1]} {tok}"
         return tok
     return None