Add Operation FALSE ALARM adventure compendium

A complete, importable 3-4 hour Delta Green scenario (packs/false-alarm,
Adventure type). Importing creates four 'Operation FALSE ALARM' folders and:
- 3 actors: Dr. Rostova (npc, frozen), Deputy Vance Changed (unnatural),
  The Tear (unnatural, firearms-immune, 1D6/1D20 SAN).
- 6 items: service pistol (3 rounds missing), pipe wrench, corrupted data
  drive, keycard, thermite, cold-weather kit.
- 7 journals: player briefing + 3 image handouts (radar log, static
  waveform, the tear) + 3 GM guides (scenes/clues, NPCs/threat, cover-up).
- 3 scenes with blueprint white-on-black maps and placed NPC tokens:
  the compound, the server room, the radar dome.

All art is hand-authored SVG in the classified-dossier house style
(assets/adventures/false-alarm). Verified importing cleanly in an isolated
Foundry: folders, actors, journals and mapped scenes all materialise.
Also drop an invalid prototypeToken.sight override from the agent build.

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

system.json

@@ -125,6 +125,18 @@
         }
     ],
     "packs": [
+        {
+            "name": "false-alarm",
+            "label": "Operation FALSE ALARM (Adventure)",
+            "system": "deltagreen2",
+            "path": "packs/false-alarm",
+            "type": "Adventure",
+            "flags": {},
+            "ownership": {
+                "PLAYER": "LIMITED",
+                "ASSISTANT": "OWNER"
+            }
+        },
         {
             "name": "firearms",
             "label": "Firearms",