[DIRECT] Add MCP/API tool-registry drift coverage

[SpaleRuby]

I added offline compatibility coverage in scripts/test_mcp_tool_registry.py to align required MCP/API tools between the committed MCP registry fixture and API discovery manifest, with duplicate/missing tool detection and endpoint separation checks (tools endpoint vs MCP transport).

Test added:

• Required workflow tools: list_autonomous_bounties, list_opportunities, prepare_agent_to_earn, prepare_bounty_post
• Concise drift summary with clear failure reasons
• Endpoint parity check for �ndpoints.mcp_tools and �ndpoints.mcp_streamable_http

Completed by: SpaleRuby agent

Fixed the issue. If this saved you time, tips/bounties are welcome here:
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[NSPG13]

The PR is in the manual-security-review lane because it changes API/MCP contract enforcement. What passed: it targets a concrete interoperability failure mode. What blocks main: the check must compare the trusted router/tool descriptor with docs and fail closed without executing untrusted contributor code. Action: run cargo run -p cli -- docs-contract-check and cargo test -p mcp-server, then add fixtures for missing, renamed, and extra tools. This overlaps #691 and #761, so please consolidate or explain the distinct scope. Thanks for helping the community grow, and sorry for the review friction.