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]>

web/src/routes/+page.svelte

@@ -185,8 +185,8 @@
 				apiJSON<ModulesResponse>('/v1/modules?limit=200'),
 				apiJSON<PeersResponse>('/v1/peers?limit=200'),
 				apiJSON<SpeakersResponse>('/v1/speakers?limit=200'),
-				apiJSON<RevisionsResponse>('/v1/revisions?limit=200'),
-				apiJSON<JobsResponse>('/v1/jobs?limit=20')
+				apiJSON<RevisionsResponse>('/v1/revisions?limit=10'),
+				apiJSON<JobsResponse>('/v1/jobs?limit=10')
 			]);
 
 			const firstReject = [m, p, s, r, j].find((x) => x.status === 'rejected');

web/src/routes/operations/+page.svelte

@@ -128,6 +128,7 @@
 	let jobs = $state<JobRow[]>([]);
 	let jobsLoading = $state(false);
 	let jobSearchQ = $state('');
+	let jobSearchDebounced = $state('');
 	let jobFilterStatus = $state('');
 	let jobFilterKind = $state('');
 	let jobFilterModule = $state('');
@@ -302,13 +303,23 @@
 				return j.kind === 'module_refresh' && mid === jobFilterModule;
 			});
 		}
-		const q = jobSearchQ.trim();
+		const q = jobSearchDebounced.trim();
 		if (q) {
 			list = list.filter((j) => jobMatchesSearch(j, q));
 		}
 		return list;
 	});
 
+	let jobSearchTimer: ReturnType<typeof setTimeout> | undefined;
+	$effect(() => {
+		const q = jobSearchQ;
+		clearTimeout(jobSearchTimer);
+		jobSearchTimer = setTimeout(() => {
+			jobSearchDebounced = q;
+		}, 250);
+		return () => clearTimeout(jobSearchTimer);
+	});
+
 	const jobModuleOptions = $derived(
 		[...moduleNameById.entries()]
 			.map(([id, name]) => ({ id, name }))
@@ -340,8 +351,18 @@
 
 	onMount(() => {
 		activeTab = parseOpsTab(page.url.searchParams.get('tab'));
+		lastLoadedTab = activeTab;
 		tabSyncReady = true;
-		void refreshAll(true);
+		void refreshActiveTab(true);
+	});
+
+	let lastLoadedTab = $state('');
+	$effect(() => {
+		if (!tabSyncReady) return;
+		const tab = activeTab;
+		if (tab === lastLoadedTab) return;
+		lastLoadedTab = tab;
+		void refreshActiveTab();
 	});
 
 	const statAccents = [
@@ -425,6 +446,29 @@
 		syncTabToUrl(activeTab);
 	});
 
+	async function refreshActiveTab(isInitial = false) {
+		if (isInitial) initialLoading = true;
+		else refreshing = true;
+		switch (activeTab) {
+			case 'revisions':
+				await loadRevisions();
+				break;
+			case 'jobs':
+				await Promise.all([loadJobs(), loadModules()]);
+				break;
+			case 'diff':
+				break;
+			case 'system':
+				await loadBirdStatus();
+				break;
+			default:
+				await loadRevisions();
+		}
+		lastUpdated = new Date();
+		initialLoading = false;
+		refreshing = false;
+	}
+
 	async function refreshAll(isInitial = false) {
 		if (isInitial) initialLoading = true;
 		else refreshing = true;