v2.4.48 – v2.4.52 — 2026-05-19

• test(services): add unit tests for placement scoring and quota enforcement
• docs(changelog): clean v2.4.48 entry — test-only release condensed to one line
• test(api): ACME advisory-lock + dedupe-window logic (8 cases)
• test(api): brute-force protection + login-protection settings (10 cases)
• test(services): add webhook event-matching, HMAC, delivery and pruning tests
• test(agent): add tests for vhost perf helpers, app-type resolution and input validation regexes
• test(agent): add cron expression validator and cron file path tests