deps(cli): bump mcp 1.23.3 → 1.27.2

Bump the MCP Python SDK from 1.23.3 to 1.27.2, picking up upstream
transport-layer fixes (modelcontextprotocol/python-sdk#2719).

Refs semgrep#11807, semgrep#11506.

Author: scottschreckengaust

.pre-commit-config.yaml

@@ -130,7 +130,7 @@ repos:
           - appdirs
           - pytest
           - pytest-mock
-          - mcp==1.16.0
+          - mcp==1.27.2
       - id: mypy
         alias: mypy-test
         name: mypy (test files)

cli/pyproject.toml

@@ -62,7 +62,7 @@ dependencies = [
   "exceptiongroup~=1.2.0",
   "glom>=23.3",
   "jsonschema~=4.25.1",
-  "mcp==1.23.3",
+  "mcp==1.27.2",
   "opentelemetry-api~=1.37.0",
   "opentelemetry-sdk~=1.37.0",
   "opentelemetry-exporter-otlp-proto-http~=1.37.0",