Fix all ESLint errors: remove unused imports, replace any types

- Remove ~60 unused imports and variables across 88 files
- Replace ~80 `any` type annotations with proper types (unknown,
  Record<string, unknown>, or specific types)
- Prefix unused callback args with underscore
- Fix unescaped JSX entities
- Lint now passes cleanly (0 errors, 2 intentional img warnings)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/lib/services/system-monitoring.service.ts

@@ -5,7 +5,7 @@ import { minioClient } from '@/lib/minio/index';
 import { getQueue, QUEUE_CONFIGS, type QueueName } from '@/lib/queue';
 import { createAuditLog } from '@/lib/audit';
 import { env } from '@/lib/env';
-import { sql, desc, or, eq } from 'drizzle-orm';
+import { sql, desc, eq } from 'drizzle-orm';
 import { logger } from '@/lib/logger';
 
 // ─── Types ────────────────────────────────────────────────────────────────────