replace Redis with an embedded SQLite string->string KV store (group commit, in-tx events, SQL search)

internal/watcher/handlers.go

@@ -25,7 +25,7 @@ func NewHandlers(watcher *Watcher, dispatcher *Dispatcher) *Handlers {
 
 // RegisterRoutes registers all watcher-related routes
 func (h *Handlers) RegisterRoutes(r *mux.Router) {
-	// Event polling (for services that don't use Redis Streams)
+	// Event polling (for services that don't consume the SSE stream)
 	r.HandleFunc("/api/events/poll", h.handlePoll).Methods("GET")
 
 	// Deprecated scan endpoints - redirect to /api/watchers
@@ -61,7 +61,7 @@ func (h *Handlers) handlePoll(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	// Read events from the Redis `file:events` stream rather than the
+	// Read events from the `file:events` stream rather than the
 	// in-memory buffer. The buffer is fed by the unused debouncer path,
 	// so it is always empty in practice — the stream is the source of truth.
 	events, err := h.dispatcher.GetRecentEvents(sinceMS, limit)