WebMCP spec moved: review the diff against our pin

[github-actions]

The WebMCP spec repo moved past our pin.

Pinned: 50c4b7fd6c4402731271649bc544b662b061ed44
Latest: cc45efcaf094021b337e0fb87fcc5332707695b1
Diff: webmachinelearning/webmcp@50c4b7f...cc45efc

Review the diff against the surfaces listed in docs/references/webmcp-spec-pin.txt,
update packages/codegen/src/outputs/tools-templates.ts if needed, then bump the pin.

[github-actions]

The WebMCP spec repo moved past our pin.

Pinned: 50c4b7fd6c4402731271649bc544b662b061ed44
Latest: f5645e9aea51eb589599f181d104a2f49430608e
Diff: webmachinelearning/webmcp@50c4b7f...f5645e9

Review the diff against the surfaces listed in docs/references/webmcp-spec-pin.txt,
update packages/codegen/src/outputs/tools-templates.ts if needed, then bump the pin.