Upgrade actions/checkout to v5 and bump SDK

Update CI gitleaks job to use actions/checkout@v5 and fetch full history (fetch-depth: 0) so gitleaks can resolve parent commits. Bump @modelcontextprotocol/sdk to v1.27.1 in package.json and regenerate pnpm lockfile. Add .tmp gitleaks artifacts (LICENSE, README, binary, report, darwin tarball).

Author: samhu1

.github/workflows/security.yml

@@ -13,7 +13,11 @@ jobs:
   gitleaks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
+        with:
+          # Gitleaks scans the commit range on pull requests and needs parent
+          # commits available locally to resolve head^..head.
+          fetch-depth: 0
       - name: Gitleaks scan
         uses: gitleaks/gitleaks-action@v2
         env:
@@ -32,7 +36,7 @@ jobs:
   audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: pnpm/action-setup@v4
       - uses: actions/setup-node@v4
         with:

.tmp/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 Zachary Rice
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.