railway: add watchPatterns so store (apps/extensions) changes deploy

Railway was skipping deploys for commits that only touched apps/extensions/**
(the store) — store changes only went live when a commit also touched a
watched path. Explicit watchPatterns cover all Docker build inputs so
store-only commits (and this one) trigger a deploy.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: ralyodio

railway.json

@@ -2,7 +2,18 @@
   "$schema": "https://railway.com/railway.schema.json",
   "build": {
     "builder": "DOCKERFILE",
-    "dockerfilePath": "Dockerfile"
+    "dockerfilePath": "Dockerfile",
+    "watchPatterns": [
+      "apps/web/**",
+      "apps/extensions/**",
+      "services/api/**",
+      "Dockerfile",
+      "Caddyfile",
+      "start.sh",
+      "*.svg",
+      "*.png",
+      "railway.json"
+    ]
   },
   "deploy": {
     "restartPolicyType": "ON_FAILURE",