user e42c6c1868 feat: add username/hostname support with IRC hostmask format ...

- Add username and hostname columns to sessions table (001_initial.sql)
- Accept optional username field in session creation and registration
  endpoints; defaults to nick if not provided
- Resolve hostname via reverse DNS of connecting client IP at session
  creation time (supports X-Forwarded-For and X-Real-IP headers)
- Display real username and hostname in WHOIS (311 RPL_WHOISUSER) and
  WHO (352 RPL_WHOREPLY) responses instead of nick/servername
- Add FormatHostmask helper for nick!user@host format
- Add SessionHostInfo type and GetSessionHostInfo query
- Include username/hostname in MemberInfo and ChannelMembers results
- Extract validateHashcash and resolveUsername helpers to stay under
  funlen limits
- Add comprehensive unit tests for all new DB functions, hostmask
  formatting, and integration tests for WHOIS/WHO responses
- Update README with hostmask documentation, new API fields, and
  updated schema reference

2026-03-17 05:34:57 -07:00

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