fix: detect entity deletion by Zeus and scripts via null tracking (#109)

The dedup optimization (commits 83/84) combined with extension gap-fill
caused Zeus-deleted entities to persist in recordings. Without an
explicit DELETE command, gap-fill extends the last alive state to the
end of the recording.

Units: add trackedUnits HashMap mirroring trackedVehicles. Each frame,
check for null object handles and send :SOLDIER:DELETE: when detected.
Remove from HashMap on disconnect/respawn to avoid duplicate DELETEs.

Vehicles: the existing isNull detection sent a final dead state but no
:VEHICLE:DELETE:, so gap-fill had no boundary. Now sends DELETE after
the dead state.

Catches all deletion sources: Zeus, deleteVehicle, garbage collection.

Author: fank

addons/recorder/fnc_addEventMission.sqf

@@ -80,6 +80,9 @@ if (isNil QEGVAR(EH,EntityRespawned)) then {
           GVAR(captureFrameNo)
         ]] call EFUNC(extension,sendData);
         _corpse setVariable [QGVARMAIN(exclude), true];
+        if (!isNil QGVAR(trackedUnits)) then {
+          GVAR(trackedUnits) deleteAt (_corpse getVariable [QGVARMAIN(id), -1]);
+        };
       };
 
       [_entity, true] spawn FUNC(addUnitEventHandlers);

addons/recorder/fnc_captureLoop.sqf

@@ -41,6 +41,7 @@ if (isNil QGVAR(startTime)) then {
 };
 
 GVAR(trackedVehicles) = createHashMap;
+GVAR(trackedUnits) = createHashMap;
 
 // Pre-compute frame intervals that depend on frameCaptureDelay (constant for the mission)
 // Must be GVARs, not private — PFH code runs in a different scope.
@@ -120,6 +121,7 @@ GVAR(PFHObject) = [
         [_x] spawn FUNC(addUnitEventHandlers);
         GVAR(nextId) = GVAR(nextId) + 1;
         _x setVariable [QGVARMAIN(isInitialized), true, true];
+        GVAR(trackedUnits) set [_x getVariable [QGVARMAIN(id), -1], _x];
         _justInitialized = true;
       };
       // Re-include units that have become player-controlled again (e.g., reconnected players)
@@ -186,6 +188,19 @@ GVAR(PFHObject) = [
       };
     } forEach (allUnits + allDeadMen);
 
+    // Detect disappeared units (deleted/garbage-collected) and report removal
+    private _toRemoveUnits = [];
+    {
+      if (isNull _y) then {
+        [":SOLDIER:DELETE:", [
+          _x,
+          GVAR(captureFrameNo)
+        ]] call EFUNC(extension,sendData);
+        _toRemoveUnits pushBack _x;
+      };
+    } forEach GVAR(trackedUnits);
+    { GVAR(trackedUnits) deleteAt _x } forEach _toRemoveUnits;
+
     {
       private _justInitialized = false;
       if !(_x getVariable [QGVARMAIN(isInitialized), false]) then {
@@ -305,6 +320,10 @@ GVAR(PFHObject) = [
           _x, _lastPos, _lastDir, 0, [], GVAR(captureFrameNo),
           0, 1, false, false, _lastSide, _lastVectorDir, _lastVectorUp, 0, 0
         ]] call EFUNC(extension,sendData);
+        [":VEHICLE:DELETE:", [
+          _x,
+          GVAR(captureFrameNo)
+        ]] call EFUNC(extension,sendData);
         _toRemove pushBack _x;
       };
     } forEach (keys GVAR(trackedVehicles));

addons/recorder/fnc_eh_disconnected.sqf

@@ -42,6 +42,9 @@ if (_unit getVariable [QGVARMAIN(isInitialized), false]) then {
     GVAR(captureFrameNo)
   ]] call EFUNC(extension,sendData);
   _unit setVariable [QGVARMAIN(exclude), true];
+  if (!isNil QGVAR(trackedUnits)) then {
+    GVAR(trackedUnits) deleteAt (_unit getVariable [QGVARMAIN(id), -1]);
+  };
 };
 
 // saveOnEmpty: if this was the last player, save immediately