Fix volcanic-agents user config: token → password

NATS's authorization.users entries don't accept a `token` field
(only `user+password`, `nkey`, or JWT). `token` at the top of the
authorization block is a single global token. NATS was crash-looping
with "unknown field 'token'" at line 20 col 32 of nats-server.conf.

Wire the NATS_VOLCANIC_AGENTS_TOKEN env var through the password
field instead. Env-var name stays the same — semantically the value
is still a bearer token, only the NATS field it's carried in changes.
CLAUDE.md and credentials.local.json updated accordingly.

CLAUDE.md

@@ -17,8 +17,8 @@ Coolify's non-secret app config (project/server UUIDs, name, domain) lives in `d
 
 There are two users, both admin (unrestricted publish/subscribe):
 
-- `admin` — user/password auth. Env vars `NATS_USER` / `NATS_PASSWORD` on the Coolify application.
+- `admin` — env vars `NATS_USER` / `NATS_PASSWORD` on the Coolify application.
-- `volcanic-agents` — token auth. Env var `NATS_VOLCANIC_AGENTS_TOKEN` on the Coolify application.
+- `volcanic-agents` — env var `NATS_VOLCANIC_AGENTS_TOKEN` on the Coolify application. Semantically a bearer token; on the wire it goes through NATS's `password` field (NATS has no per-user `token` field — that's only valid at the top of `authorization` as a single global token).
 
 ### Local credentials cache
 
@@ -29,12 +29,12 @@ A **gitignored** `credentials.local.json` at the repo root mirrors the live valu
   "url": "wss://nats.tes.gd",
   "users": {
     "admin":            { "user": "…", "password": "…", "note": "…" },
-    "volcanic-agents":  { "user": "volcanic-agents", "token": "…", "note": "…" }
+    "volcanic-agents":  { "user": "volcanic-agents", "password": "…", "note": "…" }
   }
 }
 ```
 
-Read from it with `jq`, e.g. `jq -r '.users["volcanic-agents"].token' credentials.local.json`. It is **not** the source of truth — Coolify env vars are. Regenerate it from Coolify with the snippet below if it's stale or missing.
+Read from it with `jq`, e.g. `jq -r '.users["volcanic-agents"].password' credentials.local.json`. It is **not** the source of truth — Coolify env vars are. Regenerate it from Coolify with the snippet below if it's stale or missing.
 
 The current live values are printed by:
 
@@ -110,7 +110,7 @@ asyncio.run(main())
   - `8080` — WebSocket listener, `no_tls: true`. The only port in `expose:`. Traefik terminates TLS and forwards `ws://nats:8080` from `wss://nats.tes.gd`.
   - `8222` — HTTP monitoring (`/healthz`, `/varz`, `/jsz`), used by the compose healthcheck; not routed publicly.
 - **JetStream**: enabled, persisted to the named volume `nats-data` mounted at `/data`. Limits: 256MB memory / 4GB file. Bump `max_file_store` in `nats-server.conf` if you need more.
-- **Auth**: two users in `authorization.users` — `admin` (user/password from `NATS_USER` / `NATS_PASSWORD`) and `volcanic-agents` (token from `NATS_VOLCANIC_AGENTS_TOKEN`). Both are unrestricted (no `permissions` block → admin). Substitution happens at Docker Compose parse time (the config lives inline in `docker-compose.yml` under `configs.nats-conf.content`), so NATS itself sees a static config. No accounts, no operator/JWT mode.
+- **Auth**: two users in `authorization.users` — `admin` (password from `NATS_PASSWORD`) and `volcanic-agents` (password from `NATS_VOLCANIC_AGENTS_TOKEN`, semantically a bearer token). Both are unrestricted (no `permissions` block → admin). Substitution happens at Docker Compose parse time (the config lives inline in `docker-compose.yml` under `configs.nats-conf.content`), so NATS itself sees a static config. No accounts, no operator/JWT mode.
 
 ## Managing / redeploying
 
@@ -135,4 +135,4 @@ To add a second user (e.g. a scoped app account), edit the `authorization.users`
 | `docker-compose.yml` | Single `nats` service, exposes 4222/8080/8222 internally; only 8080 is routed publicly via `SERVICE_FQDN_NATS_8080` + Coolify's `docker_compose_domains`. The NATS config lives inline under `configs.nats-conf.content` (delivered to the container as `/etc/nats/nats-server.conf`) — no separate config file, no bind mount (Coolify's compose executor rewrites relative host paths into a persistent app dir and can't materialise a source file for them). |
 | `.gitignore` | Keeps `deploy.json` and `credentials.local.json` out of git. |
 | `deploy.json` (local only) | Coolify app config used by the `deploying-to-coolify-via-api` skill. |
-| `credentials.local.json` (local only) | Cached NATS connection details for both users (WS URL, admin user/password, volcanic-agents token). Mirrors the Coolify env vars; regenerate from the API if stale. |
+| `credentials.local.json` (local only) | Cached NATS connection details for both users (WS URL, admin user/password, volcanic-agents user/password-that-is-a-token). Mirrors the Coolify env vars; regenerate from the API if stale. |

docker-compose.yml

@@ -40,7 +40,7 @@ configs:
       authorization {
         users = [
           { user: "${NATS_USER}", password: "${NATS_PASSWORD}" },
-          { user: "volcanic-agents", token: "${NATS_VOLCANIC_AGENTS_TOKEN}" }
+          { user: "volcanic-agents", password: "${NATS_VOLCANIC_AGENTS_TOKEN}" }
         ]
       }