chore(deps): Update 7 dependencies - Round 2

Dependencies updated:
- agents: 0.2.20 → 0.2.23
- @modelcontextprotocol/sdk: 1.20.2 → 1.22.0 (MCP SDK update)
- @biomejs/biome: 2.3.2 → 2.3.7
- @cloudflare/vitest-pool-workers: 0.10.3 → 0.10.10
- @types/node: 24.10.0 → 24.10.1
- wrangler: 4.45.3 → 4.50.0

GitHub Actions:
- actions/checkout: v5 → v6

Note: Vitest v4 upgrade (vitest, @vitest/coverage-v8, @vitest/ui)
postponed - waiting for @cloudflare/vitest-pool-workers to support v4.

All tests passing (109/109)
Type-check: ✓

Author: claude

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v6
@@ -60,7 +60,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup Node.js
       uses: actions/setup-node@v6