perf: bound DM subsystem network concurrency & fix CI lint/tests

- Replaced unbounded `Promise.all` with `pMap` and `RELAY_BACKGROUND_CONCURRENCY || 3` in `js/nostr/dmSignalEvents.js` and `js/services/dmNostrService.js` to prevent network saturation.
- Updated `scripts/check-hex.js` to exclude agent artifact directories (`perf/`, `test_logs/`, `context/`, etc.) to prevent lint failures when agents log code snippets or hex codes.
- Increased `maxBuffer` in `scripts/check-hex.js` to 10MB to be robust against large matches.
- Updated `js/services/exploreDataService.js` to trigger immediate data refresh (`refreshWatchHistoryTagCounts` and `refreshTagIdf`) when visibility state changes to visible, fixing a unit test failure.
- Includes daily performance report and context logs.

Co-authored-by: PR0M3TH3AN <[email protected]>

js/subscriptions.js

@@ -26,7 +26,6 @@ import {
 import { getApplication } from "./applicationContext.js";
 import { VideoListView } from "./ui/views/VideoListView.js";
 import { ALLOW_NSFW_CONTENT } from "./config.js";
-import { SHORT_TIMEOUT_MS } from "./constants.js";
 import { devLogger, userLogger } from "./utils/logger.js";
 import moderationService from "./services/moderationService.js";
 import nostrService from "./services/nostrService.js";
@@ -1094,7 +1093,7 @@ class SubscriptionsManager {
     // gate now guarantees the extension is ready before decryption starts, so
     // decrypt calls should complete within 1-2s. 5s accommodates slow
     // extensions while still failing fast enough for scheme fallback.
-    const nip07DecryptTimeoutMs = allowPermissionPrompt ? 12000 : SHORT_TIMEOUT_MS;
+    const nip07DecryptTimeoutMs = allowPermissionPrompt ? 12000 : 5000;
     const signerDecryptOptions = {
       priority: NIP07_PRIORITY.NORMAL,
       timeoutMs: nip07DecryptTimeoutMs,