fix(bridge): protocol 13 step 2 — expiry, gathering, raids, plugin loads, and a ZoneManager helper (F1 F3 F4 F8 F12 F13)

The bridge's half of PLAN_FIXES §6 step 2 (decisions D181-D185, docs#288).

- F13: `world.expired` carries the entity's kind as `what`. It used to write
  it over the frame's own `kind`, so every expiry left filed as "zone".
- F1 (D159): `gathered` also counts OnDispenserBonus (the final-hit bonus),
  OnCollectiblePickup (hemp, mushrooms, stones off the ground) and
  OnGrowableGathered (farmed plants); all three are void and in ExpectedHooks.
- F3: taking down a building block you own, or one on a cupboard you are
  authorised on, no longer counts toward `structures`. The frame still goes.
- F4: every remaining UserIDString is SteamIdOf(userID), so a player another
  plugin spawned is never `steamId: null`.
- F8 (D184): `plugin.loaded` / `plugin.unloaded`, once the world is ready,
  with the permissions that plugin added or removed (a diff of the registered
  list, taken a tick after the hook).
- F12 (D181, D182): RunicGatewayZones.cs, a D168 helper shipped beside the
  bridge, Harmony-postfixes ZoneManager's Zone.InitializeZone and, a tick
  later, enters every connected player ZoneManager's own IsPositionInZone
  places inside, through ZoneManager's own OnPlayerEnterZone. Without it (or
  when it cannot find what it patches) the bridge scores its zones by
  IsPositionInZone. Hello reports `zoneHelper: { state, version?, reason? }`.
- release.yml stages every helper beside the bridge and lists each .cs with
  its sha256 in manifest.files; the installer and the egg place them all.

Not yet compiled: this is walked on both rigs before it merges.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

overlay.toml

@@ -38,9 +38,12 @@ protocol = 13
 
 # ── Oxide compatibility ──────────────────────────────────────────────────────
 #
-# The overlay only ADDS a file — one plugin into `oxide/plugins/` — and patches
-# nothing, so it is expected to work on any reasonably current Oxide. This is the
-# oldest build it is known good on.
+# The overlay only ADDS files — the bridge, and beside it the ZoneManager helper
+# (`RunicGatewayZones.cs`, docs/modules/rust/PLAN_FIXES.md D181, D182), both into
+# `oxide/plugins/` — and patches nothing on disk, so it is expected to work on any
+# reasonably current Oxide. The helper patches ZoneManager in memory with Harmony,
+# which both frameworks load; without it the bridge still loads and falls back.
+# This is the oldest build it is known good on.
 #
 # There is no `patches_verified_against` key, and there is no `patches/` tier:
 # Rust's server is a binary and Oxide's hook API is the supported way in, so