feat: IPC additions for reminders/events/routines, ack tracking, tool management

- Extend IPC wire protocol: add ListReminders, ListEvents, ListProposedRoutines,
  DismissProposedRoutine, AcceptProposedRoutine IPC methods with request/response
  types. Update wire.go with new message kinds.
- Add ack_sends table (migration #5): tracks sev4 telegram repeat-til-ack
  delivery state with rule name + timestamp, indexed for dedup.
- Add Store.DeleteTool: permanently removes a tool row (for dismissing proposed
  tools), idempotent on missing tool.
- Update tick.go: wire new IPC handlers into daemon tick.

internal/store/migrations.go

@@ -26,6 +26,30 @@ ALTER TABLE reminders ADD COLUMN next_fire_ts INTEGER;`, // #2
 		meta       TEXT NOT NULL DEFAULT '{}',
 		created_ts INTEGER NOT NULL
 	);`, // #3 — long-term vector memory (persistent backend for internal/memory)
+	`CREATE TABLE IF NOT EXISTS events (
+		id         INTEGER PRIMARY KEY AUTOINCREMENT,
+		fact_id    INTEGER NOT NULL REFERENCES facts(id),
+		action     TEXT NOT NULL,
+		object     TEXT NOT NULL,
+		ts         INTEGER NOT NULL
+	);
+	CREATE INDEX IF NOT EXISTS idx_events_action_object ON events (action, object, ts DESC);
+	CREATE TABLE IF NOT EXISTS proposed_routines (
+		id            INTEGER PRIMARY KEY AUTOINCREMENT,
+		action        TEXT NOT NULL,
+		object        TEXT NOT NULL,
+		interval_days REAL NOT NULL,
+		status        TEXT NOT NULL DEFAULT 'proposed' CHECK (status IN ('proposed','accepted','dismissed')),
+		created_ts    INTEGER NOT NULL,
+		reminder_id   INTEGER REFERENCES reminders(id),
+		UNIQUE(action, object)
+	);`, // #4 — event extraction + pattern inference
+
+	`CREATE TABLE IF NOT EXISTS ack_sends (
+		rule      TEXT NOT NULL,
+		sent_at   INTEGER NOT NULL
+	);
+	CREATE INDEX IF NOT EXISTS idx_ack_sends_rule ON ack_sends (rule, sent_at DESC);`, // #5 — sev4 telegram repeat-til-ack tracking
 }
 
 // migrate applies every migration with a number greater than the DB's current