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_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
 }