Add Grafana MCP configuration and corresponding test case

[ArnabChatterjee20k]

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[greptile-apps]

Greptile Summary

The PR adds an example Grafana MCP configuration and propagates the global debug-logging setting into Claude runner configuration.

• Documents Grafana and Cloudflare Access environment settings in the example configuration.
• Adds redacted debug logging for attached MCP configurations.
• Adds serialization and redaction coverage for MCP environment values.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
claudear.example.toml	Adds a commented Grafana MCP example with optional Cloudflare Access headers.
crates/claudear-integrations/src/runner/claude.rs	Adds MCP configuration redaction, debug logging, and associated unit coverage.
src/lib.rs	Propagates the global debug-logging setting when constructing the library’s Claude runner.
src/main.rs	Propagates the global debug-logging setting through the main executable’s Claude runner construction.

_{Reviews (3): Last reviewed commit: "Add debug logging support for MCP config..." | Re-trigger Greptile}