Promote Petstore MCP HTTP agent example to production

[sjungwon03]

Promote the reviewed Petstore MCP HTTP agent rewrite from current dev 517af2a6dfb8601dea9514592a2225b9d2564e9f to release-only main. Main 3ef010f2207009731d9763d7e04c9019dfb70197 is a verified ancestor after reconciliation PR #30. Require a fresh exact-head review, green verify and release-promotion checks, resolved review threads, and squash merge.

[sjungwon03]

Completed by reviewed production promotion PR #32. Canonical main is 0fc09cce18f38f17e71f1e303bdaccbab387f60a; post-merge Verify workflow 30427410756 succeeded. Clean-install verification passed with 6 test files / 10 tests, production audit 0 vulnerabilities, the loopback MCP protocol fixture, and the TypeChain @agent MCP-client fixture.