feat(tracker): Phase 1 plugin — Matrix + SQLite, rules-only

Sibling to journal/, implements the Community Organizer spec
(docs/community-organizer-spec.md) over maubot:

  !add <text>            freeform inbox capture; rules classify
  !task <text> [#tag…]   explicit task
  !sidequest [#tag…]     optional / passion-project item
  !remind in <N>(s|m|h|d) <text>   chat-side timed reminder
  !done <id>             close task or sidequest
  !list [type]           query open items
  !setup add/remove      per-room shortcut config

One @command.passive dispatcher routes universal verbs to handlers
and unknown verbs through the per-room shortcut table. Avoids the
multi-line @command.new footgun (per ~/dev/CLAUDE.md) and lets
shortcuts coexist with universal verbs without decorator priority
games.

Rules classifier (classify.py) is intentionally conservative — only
buckets on clear shapes (buy keywords, past-tense markers, todo
intent, remind prefixes); ambiguous capture lands in `!list inbox`.
LLM fallback is Phase 2b on a dedicated inference node.

Reminders (scheduler.py) replay from DB on bot start so restarts
don't lose pending timers; missed-while-down stay open for query.

`nostr_event_id` column reserved for Phase 2a — Matrix-local only
for now.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tracker/maubot.yaml

@@ -0,0 +1,9 @@
+maubot: 0.1.0
+id: dev.aiolabs.tracker
+version: 0.1.0
+license: AGPL-3.0-or-later
+modules:
+  - tracker
+main_class: TrackerBot
+database: true
+database_type: asyncpg