feat(sense): add reconciliation safety controls [T-012]

Sense/internal/store/repository.go

@@ -21,6 +21,8 @@ var (
 	ErrAreaPolicyUnavailable      = errors.New("area policy unavailable")
 	ErrAreaPolicyInvalid          = errors.New("area policy invalid")
 	ErrAreaPolicyDenied           = errors.New("area policy denies imaging device")
+	ErrReconcileLeaseLost         = errors.New("reconcile lease lost")
+	ErrOperationalLeaseLost       = errors.New("operational lease lost")
 )
 
 // Repository is the storage boundary used by the Sense process. SQLite stays
@@ -31,6 +33,10 @@ type Repository interface {
 	SetDesiredState(context.Context, string, device.DesiredState) error
 	GetDevice(context.Context, string) (device.Device, error)
 	ListDueReconcile(context.Context, time.Time, int) ([]ReconcileCandidate, error)
+	ClaimDueReconcile(context.Context, ReconcileClaim) ([]ReconcileCandidate, error)
+	RenewReconcileLease(context.Context, string, string, string, time.Time, time.Duration) (bool, error)
+	CompleteReconcile(context.Context, string, int64, string, string, time.Time) error
+	FailReconcile(context.Context, string, int, time.Time, string, string, string, time.Time) error
 	ListEnabledVideoDevices(context.Context, int) ([]device.Device, error)
 	MarkReconciled(context.Context, string, int64, time.Time) error
 	MarkReconcileFailure(context.Context, string, int, time.Time, string, time.Time) error
@@ -39,6 +45,17 @@ type Repository interface {
 	ConvergenceSnapshot(context.Context) (ConvergenceSnapshot, error)
 }
 
+// ReconcileClaim identifies one short-lived batch claim. Token is unique per
+// run and fences a worker whose lease expired and was acquired by another
+// process. SQLite accepts the shape but remains explicitly single-process.
+type ReconcileClaim struct {
+	Owner         string
+	Token         string
+	Now           time.Time
+	LeaseDuration time.Duration
+	Limit         int
+}
+
 func OpenRepository(ctx context.Context, driver, dsn string) (Repository, error) {
 	switch strings.ToLower(strings.TrimSpace(driver)) {
 	case "", DriverSQLite: