feat: subscribe ACL and app scoping for event subscriptions (PUT-1672)

[Salazareo]

Stacked on DS/put-1671 — review only this PR's diff; merges bottom-up.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	93.82% ⬆️ +0.06%	25424 / 27098
🔵	Statements	92.06% ⬆️ +0.06%	27491 / 29861
🔵	Functions	90.15% ⬆️ +0.14%	4496 / 4987
🔵	Branches	80.76% ⬆️ +0.11%	18423 / 22811

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/backend/services/events/EventsService.ts	90.7%	77.55%	94.54%	95.26%	193-196, 230, 255, 294-295, 310, 317-321, 335-337, 376, 378, 383, 404, 406, 435, 456, 479, 548, 662, 682, 738, 776-778
src/backend/services/events/authorization.ts	86.48%	77.77%	100%	96.87%	124, 168, 170, 173, 190
src/backend/services/events/registry.ts	100%	100%	100%	100%
src/backend/services/events/subscriptionCache.ts	93.33%	94.11%	87.5%	96.15%	100, 108
src/backend/services/fs/FSService.ts	93.78% ⬆️ +0.01%	85.52% ⬇️ -0.09%	98.87% ⬆️ +0.02%	94.43% ⬆️ +0.01%	111, 198, 230, 238, 267, 274, 305, 335, 342, 443-445, 455-457, 537, 565, 573-575, 604, 655-659, 762, 849, 866, 879, 910, 917, 926-929, 934-936, 1007-1009, 1239-1242, 1254, 1263, 1279-1282, 1299, 1437-1439, 1617-1621, 1637-1639, 1697-1699, 1720, 1754-1756, 1909-1911, 1948-1950, 2046-2048, 2089-2091, 2112-2119, 2138-2140, 2146-2148, 2195-2197, 2203-2205, 2218-2221, 2228-2230, 2288-2292, 2309-2313, 2329-2333, 2414-2418, 2432-2445, 2594-2598, 2612-2625, 2658-2661, 2720-2722, 2745-2747, 2813, 3182-3186, 3214-3218, 3333, 3491, 3735, 3833, 4106, 4213, 4241-4243
src/backend/stores/events/EventSubscriptionStore.ts	96.74%	70.58%	100%	99.09%	329, 342, 404, 408

Generated in workflow #934 for commit 58750f1 by the Vitest Coverage Report Action