v1.62.3

What's Changed

• fix(thumbnails): skip non-image files in generate_thumbnails backfill by @biagiodistefano in #477
• feat(scripts): Loki log-reader CLI + skill + /logs command by @biagiodistefano in #481
• fix: harden questionnaire/poll access control and improve observability by @biagiodistefano in #482

Full Changelog: v1.62.2...v1.62.3