• version bump to v4.9.3 (Dries Peeters)
• docs: Add comprehensive implementation documentation (Dries Peeters)
• test: Add critical edge case tests for InvoiceService (Dries Peeters)
• perf: Add eager loading for comment attachments in task view (Dries Peeters)
• feat: Add comment attachment UI and file upload interface (Dries Peeters)
• feat: Add comment attachment routes and API support (Dries Peeters)
• feat: Add comment attachments model and migration (Dries Peeters)
• feat: Add offline mode UI indicator component (Dries Peeters)