refactor(db): normalize asn prefix cache and ttl cleanup

Строки asn_prefix_cache_row; периодический prune через evobgp-ingest.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/store/backend.go

@@ -112,6 +112,9 @@ type Backend interface {
 
 	// Ping verifies backend connectivity (no-op for in-memory).
 	Ping(ctx context.Context) error
+
+	// RunPeriodicMaintenance prunes stale DB rows (no-op for in-memory).
+	RunPeriodicMaintenance(ctx context.Context)
 }
 
 // ASNPrefixCacheEntry is a cached RIPEstat response for one ASN.

internal/store/memory.go

@@ -305,6 +305,11 @@ func (m *Memory) Ping(ctx context.Context) error {
 	return nil
 }
 
+// RunPeriodicMaintenance is a no-op for the in-memory backend.
+func (m *Memory) RunPeriodicMaintenance(ctx context.Context) {
+	_ = ctx
+}
+
 // ListTenantIDs returns tenant ids sorted lexicographically.
 func (m *Memory) ListTenantIDs() ([]string, error) {
 	m.mu.RLock()