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/ipc/wire.go

@@ -37,9 +37,13 @@ const (
 	MethodStoreEncryptionKey Method = "store_encryption_key"
 	MethodUnlock             Method = "unlock"
 	MethodLookupTool         Method = "lookup_tool"
-	MethodListTools          Method = "list_tools"
-	MethodRevertFact         Method = "revert_fact"
+	MethodListTools              Method = "list_tools"
+	MethodDeleteTool             Method = "delete_tool"
+	MethodListProposedRoutines   Method = "list_proposed_routines"
+	MethodDismissProposedRoutine Method = "dismiss_proposed_routine"
+	MethodRevertFact             Method = "revert_fact"
 	MethodTickTrace          Method = "tick_trace"
+	MethodChat               Method = "chat"
 )
 
 // Request — one frame from module to core. Params is the JSON-encoded argument