feat(keeld): construct AW memory store, nop fallback when AW is down

internal/harness/services.go

@@ -6,18 +6,21 @@ import (
 	"keel/internal/ai"
 	"keel/internal/enforce"
 	"keel/internal/knowledge"
+	"keel/internal/memory"
 	"keel/internal/tasks"
 )
 
 // Services is the shared infrastructure every mode receives from the harness.
 // Dir is the mode's namespaced persistence directory (~/.keel/modes/<kind>);
 // modes build their own file paths under it. Notify fires the harness change
-// listeners (web SSE + status bar).
+// listeners (web SSE + status bar). Memory is Keel's durable cross-run event
+// store (AW-backed, or a nop when AW is down).
 type Services struct {
 	AI        *ai.Service
 	Tasks     tasks.Provider
 	Knowledge knowledge.Source
 	Enforce   enforce.Guard
+	Memory    memory.Store
 	Clock     func() time.Time
 	Dir       string
 	Notify    func()