Add deep research, AI v2, bulk data, markets, and new API endpoints to skill docs

[ryansann]

Summary

• Root SKILL.md: Added Deep Research API (4 endpoints), AI v2 chat completions, Trending Questions, Bulk Data Service, Markets API, and additional sub-endpoints for Signal (mindshare gainers/losers by timeframe), Token Unlocks (allocations, unlocks), and Fundraising (round investors, fund managers). Added routing guide entries and example questions.
• OpenClaw SKILL.md: Added Deep Research, AI v2, Trending Questions, Bulk Data, and Markets to the service routing table. Added Deep Research curl example. Added routing guidance for Bulk Data and Deep Research.
• OpenClaw api_services.md: Added all new endpoints with parameters — Deep Research Service section, AI v2 params (verbosity, citations, related questions, response_format), Trending Questions, 4 specific mindshare endpoints, 3 Markets endpoints, Token Unlocks allocations/unlocks, Fundraising round investors/fund managers, full Bulk Data Service section, and Markets Service section.