correlator: always run the dispatch-strict fit test, not name-guessed (#134)

is_dispatch was computed from _is_dispatch_channel(talkgroup_name) and picked between two _call_fits_incident evaluation orders: dispatch (requires a positive signal, runs location-conflict/content-divergence vetoes on unit overlap) vs tactical (skips both vetoes, defaults to True on no signal at all within 20 min). Per #133's reasoning, a name not literally containing dispatch/patched/primary got the unvetoed, default-True path solely because of its label. Hardcoded is_dispatch=True at its one real call site; the tactical branch and its own tests stay in place, unreached.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Claude-Session: https://claude.ai/code/session_01Tbknwttzou4s46PAykmtix

drb-c2-core/tests/test_correlator_merge_caps.py

@@ -153,12 +153,22 @@ def test_thin_call_with_no_overlap_does_not_attach_on_a_tactical_channel():
     assert decision["action"] == "orphan"
 
 
-def test_tactical_thin_call_still_attaches_inside_its_own_window():
-    """Bounded, not removed — a "10-4" on a working channel is still context."""
+def test_tactical_named_channel_uses_the_dispatch_window_now():
+    """server-26#134: is_dispatch is hardcoded True — a channel's name no
+    longer changes the thin window. 14 min (the old tactical bound minus 1,
+    inside the old 15-min window) is now past the 5-min dispatch window."""
     inc = _incident(idle_minutes=settings.tg_thin_idle_minutes - 1)
     decision = _run_decision(_ctx(
         all_active=[inc], recent=[inc], talkgroup_name=TACTICAL_TG,
     ))
+    assert decision["action"] == "orphan"
+
+
+def test_tactical_named_channel_still_attaches_inside_the_dispatch_window():
+    inc = _incident(idle_minutes=settings.tg_dispatch_thin_idle_minutes - 1)
+    decision = _run_decision(_ctx(
+        all_active=[inc], recent=[inc], talkgroup_name=TACTICAL_TG,
+    ))
     assert decision["action"] == "link"
     assert decision["corr_debug"]["corr_path"] == "fast/thin"