Migrate three pure-function modules from Elixir to Gleam:
- polling_offset: deterministic hash-based polling offset (pure Gleam, no FFI)
- changelog_parser: text parsing logic in Gleam, thin Elixir wrapper for File I/O
- user_agent_parser: regex-based UA parsing in Gleam with Erlang FFI for
atom-keyed map conversion
Add gleam_regexp dependency for regex support in Gleam modules.
Update all call sites and tests to use Gleam module atoms.
Reviewed-on: graham/towerops-web#103
- Activity feed: use schema modules instead of string table names in Ecto
queries to fix UUID encoding (Postgrex expected binary, got string)
- Changelog parser: remove plain hyphen from separator character class
to prevent splitting on date hyphens (2026-02-13)
- Fix broken route paths in dashboard (/discovery, /subscribers/trace, /config-changes)
- Fix insights empty state settings link (org-scoped route)
- Add underscores to all 86400 literals across 6 files
- Alphabetize aliases in search.ex and agent_channel.ex
- Extract changelog parser helper to reduce nesting
- Extract dashboard impact calculation to reduce nesting
- Refactor agent_channel config change detection (pattern match, extract function)
- Combine double Enum.reject into single call in trace.ex
- Fix line length in trace.ex search query
- Replace length/1 > 0 with != [] in trace_live
- Run mix format on all files
- ChangelogParser: parses priv/static/changelog.txt into structured entries
- ChangelogLive: timeline view with DaisyUI styling
- Route at /changelog in authenticated scope
- What's New link in org dropdown menu
