Socket v6.13.2

What changed

• Bumped all maintained Socket version surfaces to 6.13.2.
• Published a patch Socket release so installed Socket marketplaces can refresh the Git-backed Speak Swiftly entry from gaelic-ghost/SpeakSwiftlyServer.

Breaking changes

• None.

Migration/upgrade notes

• Run codex plugin marketplace upgrade socket to refresh an installed Socket marketplace after this release.

Verification performed

• uv run scripts/validate_socket_metadata.py
• Temporary CODEX_HOME local marketplace smoke test for speak-swiftly
• scripts/release.sh release-ready 6.13.2
• GitHub Actions: Validate Socket Metadata on main