refactor(httpapi): readiness ping via store backend

ARCH-09: Ping на store.Backend; readiness без прямого pgxpool.Ping в handler.
Co-authored-by: Cursor <[email protected]>

internal/httpapi/routes.go

@@ -84,12 +84,15 @@ func (s *Server) handleReady(w http.ResponseWriter, r *http.Request) {
 	checks := map[string]string{"store": "ok", "jobs": "memory"}
 	ctx, cancel := context.WithTimeout(r.Context(), 2*time.Second)
 	defer cancel()
+	if err := s.store.Ping(ctx); err != nil {
+		checks["store"] = "unavailable"
 		if s.pgPool != nil {
-		if err := s.pgPool.Ping(ctx); err != nil {
 			checks["postgres"] = "unavailable"
+		}
 		writeJSON(w, http.StatusServiceUnavailable, map[string]any{"status": "not_ready", "checks": checks})
 		return
 	}
+	if s.pgPool != nil {
 		checks["postgres"] = "ok"
 	} else {
 		checks["store_backend"] = "memory"

internal/repository/postgres.go

@@ -71,6 +71,11 @@ func (p *Postgres) DemoIDs() (tenant, moduleCDN, moduleIP, revision, speaker str
 	return p.demoTenant, p.demoCDN, p.demoIP, p.demoRev, p.demoSpk
 }
 
+// Ping checks PostgreSQL connectivity.
+func (p *Postgres) Ping(ctx context.Context) error {
+	return p.pool.Ping(ctx)
+}
+
 func (p *Postgres) MaterializedPrefixStats() (max int, sum int) {
 	ctx := context.Background()
 	// Агрегация в БД — не тащим все строки config_revision в память.

internal/store/backend.go

@@ -1,6 +1,9 @@
 package store
 
-import "time"
+import (
+	"context"
+	"time"
+)
 
 // Backend is the persistence abstraction for the control plane (memory, PostgreSQL, SQLite).
 type Backend interface {
@@ -90,6 +93,9 @@ type Backend interface {
 	// ASNPrefixCache stores RIPEstat announced-prefixes per ASN (global TTL cache).
 	GetASNPrefixCache(asn int64) (*ASNPrefixCacheEntry, bool, error)
 	SetASNPrefixCache(asn int64, holder string, prefixes []string) error
+
+	// Ping verifies backend connectivity (no-op for in-memory).
+	Ping(ctx context.Context) error
 }
 
 // ASNPrefixCacheEntry is a cached RIPEstat response for one ASN.

internal/store/memory.go

@@ -1,6 +1,7 @@
 package store
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"sort"
@@ -291,6 +292,12 @@ func (m *Memory) DemoIDs() (tenant, moduleCDN, moduleIP, revision, speaker strin
 	return m.demoTenantID, m.demoModuleCDN, m.demoModuleIP, m.demoRevisionID, m.demoSpeakerID
 }
 
+// Ping is a no-op for the in-memory backend.
+func (m *Memory) Ping(ctx context.Context) error {
+	_ = ctx
+	return nil
+}
+
 // ListTenantIDs returns tenant ids sorted lexicographically.
 func (m *Memory) ListTenantIDs() ([]string, error) {
 	m.mu.RLock()