chore(deps): bump rmcp from 0.11.0 to 0.12.0

Bumps [rmcp](https://github.com/modelcontextprotocol/rust-sdk) from 0.11.0 to 0.12.0.
- [Release notes](https://github.com/modelcontextprotocol/rust-sdk/releases)
- [Commits](modelcontextprotocol/rust-sdk@rmcp-v0.11.0...rmcp-v0.12.0)

---
updated-dependencies:
- dependency-name: rmcp
  dependency-version: 0.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -31,7 +31,7 @@ mcp-introspector = { path = "crates/mcp-introspector" }
 mcp-server = { path = "crates/mcp-server" }
 rayon = "1.11"
 regex = "1.12"
-rmcp = "0.11"
+rmcp = "0.12"
 schemars = "1.1.0"
 serde = "1.0"
 serde_json = "1.0"