Perf Mcp

Adds four tools to catch and fix AI mistakes before they hit production. perf_verify detects factual hallucinations using multi-channel verification beyond simple LLM checks, perf_validate enforces JSON schemas with auto-repair for type errors and malformed enums, perf_correct handles general output issues by classifying error types, and perf_chat routes requests to the optimal model from GPT-4o, Claude, Gemini, and 20+ others. Requires a Perf API key with 200 free verifications to start. Useful when you're building agents or workflows where AI outputs feed into structured systems and bad data causes downstream failures.