feat: local tier gateway with PGlite + Gitea-only publishing + repo linking

- Add PGlite (embedded Postgres) for local tier — gateway runs without
  external PG server. Same schema, same Drizzle API, zero module refactor.
- Install wizard now offers tier selection (local vs team).
  Local skips DATABASE_URL/VALKEY_URL, writes mosaic.config.json.
- Comment out npmjs publish step in CI (preserved for future use).
- Revert gateway publishConfig to Gitea registry, include in Gitea publish.
- Add repository field to all 23 publishable package.json files for
  Gitea package-to-repo linking.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/discord/package.json

@@ -1,6 +1,11 @@
 {
   "name": "@mosaic/discord-plugin",
   "version": "0.0.2",
+  "repository": {
+    "type": "git",
+    "url": "https://git.mosaicstack.dev/mosaic/mosaic-stack.git",
+    "directory": "plugins/discord"
+  },
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "exports": {

plugins/macp/package.json

@@ -1,6 +1,11 @@
 {
   "name": "@mosaic/oc-macp-plugin",
   "version": "0.0.2",
+  "repository": {
+    "type": "git",
+    "url": "https://git.mosaicstack.dev/mosaic/mosaic-stack.git",
+    "directory": "plugins/macp"
+  },
   "type": "module",
   "main": "src/index.ts",
   "description": "OpenClaw ACP runtime backend that routes sessions_spawn(runtime:\"macp\") to the Pi MACP runner.",

plugins/mosaic-framework/package.json

@@ -1,6 +1,11 @@
 {
   "name": "@mosaic/oc-framework-plugin",
   "version": "0.0.2",
+  "repository": {
+    "type": "git",
+    "url": "https://git.mosaicstack.dev/mosaic/mosaic-stack.git",
+    "directory": "plugins/mosaic-framework"
+  },
   "type": "module",
   "main": "src/index.ts",
   "description": "Injects Mosaic framework rails, runtime contract, and active mission context into all OpenClaw agent sessions and ACP subagent spawns.",

plugins/telegram/package.json

@@ -1,6 +1,11 @@
 {
   "name": "@mosaic/telegram-plugin",
   "version": "0.0.2",
+  "repository": {
+    "type": "git",
+    "url": "https://git.mosaicstack.dev/mosaic/mosaic-stack.git",
+    "directory": "plugins/telegram"
+  },
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "exports": {