perf: quick wins for pipeline, jobs, httpapi and web ops

- CDN snapshot: batch merge после parallel fetch, без race на persist
- ListRevisionPrefixes: лёгкая проверка revision вместо GetRevision
- Jobs: timeout/cancel context для pipeline и deploy
- HTTP server timeouts; кэш birdc для GET /peers
- ListModules: batch DoH profiles одним запросом
- Web: tab-scoped load на /operations, debounce job search, меньше over-fetch на dashboard

Co-authored-by: Cursor <[email protected]>

internal/repository/postgres.go

@@ -126,6 +126,7 @@ func (p *Postgres) ListModules(tenantID string) []*store.Module {
 	}
 	defer rows.Close()
 	var out []*store.Module
+	moduleByID := make(map[string]*store.Module)
 	for rows.Next() {
 		var m store.Module
 		m.TenantID = tenantID
@@ -152,10 +153,11 @@ func (p *Postgres) ListModules(tenantID string) []*store.Module {
 			t := last.UTC()
 			m.LastRefreshedAt = &t
 		}
-		if err := p.fillModuleDohFields(ctx, &m); err != nil {
-			continue
-		}
 		out = append(out, &m)
+		moduleByID[m.ID] = &m
+	}
+	if err := p.batchFillModuleDohFields(ctx, moduleByID); err != nil {
+		return nil
 	}
 	return out
 }
@@ -685,7 +687,13 @@ func (p *Postgres) ListRevisionPrefixes(tenantID, revisionID string, cursor stri
 		}
 	}
 	ctx := context.Background()
-	if _, err := p.GetRevision(tenantID, revisionID); err != nil {
+	var one int
+	if err := p.pool.QueryRow(ctx, `
+		SELECT 1 FROM config_revision WHERE id = $1::uuid AND tenant_id = $2::uuid`,
+		revisionID, tenantID).Scan(&one); err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, "", false
+		}
 		return nil, "", false
 	}
 	rows, err := p.pool.Query(ctx, `

internal/repository/postgres_module_doh.go

@@ -10,28 +10,41 @@ func (p *Postgres) fillModuleDohFields(ctx context.Context, m *store.Module) err
 	if m == nil {
 		return nil
 	}
+	return p.batchFillModuleDohFields(ctx, map[string]*store.Module{m.ID: m})
+}
+
+func (p *Postgres) batchFillModuleDohFields(ctx context.Context, modules map[string]*store.Module) error {
+	if len(modules) == 0 {
+		return nil
+	}
+	ids := make([]string, 0, len(modules))
+	for id := range modules {
+		ids = append(ids, id)
+	}
 	rows, err := p.pool.Query(ctx, `
-		SELECT doh_profile_id::text
+		SELECT module_id::text, doh_profile_id::text
 		FROM module_doh_profile
-		WHERE module_id = $1
-		ORDER BY sort_order, doh_profile_id`, m.ID)
+		WHERE module_id = ANY($1::uuid[])
+		ORDER BY module_id, sort_order, doh_profile_id`, ids)
 	if err != nil {
 		return err
 	}
 	defer rows.Close()
-	var ids []string
+	byModule := make(map[string][]string, len(modules))
 	for rows.Next() {
-		var id string
-		if err := rows.Scan(&id); err != nil {
+		var moduleID, profileID string
+		if err := rows.Scan(&moduleID, &profileID); err != nil {
 			return err
 		}
-		ids = append(ids, id)
+		byModule[moduleID] = append(byModule[moduleID], profileID)
 	}
 	if err := rows.Err(); err != nil {
 		return err
 	}
-	m.DohProfileIDs = store.NormalizeDohProfileIDList(ids)
-	m.SyncLegacyDohProfileID()
+	for id, m := range modules {
+		m.DohProfileIDs = store.NormalizeDohProfileIDList(byModule[id])
+		m.SyncLegacyDohProfileID()
+	}
 	return nil
 }