docs: update CI workflow and AGENTS.md for consolidated deps

Update references to removed web/package.json:
- CI workflow: Remove 'cd web && bun install' step
- AGENTS.md: Remove web-specific dev commands (cd web && bun run dev/build)
- AGENTS.md: Update schema location to reflect domain module split
- Add Docker commands as recommended local dev approach

All dependencies now installed from root package.json.

.github/workflows/deploy.yml

@@ -43,9 +43,7 @@ jobs:
           bun-version: latest
 
       - name: Install Dependencies
-        run: |
-          bun install --frozen-lockfile
-          cd web && bun install --frozen-lockfile
+        run: bun install --frozen-lockfile
 
       - name: Create Config File
         run: |