Add repair notes journal with running feed, visibility, and status tagging

New repair_note table for timestamped journal entries on tickets. Each
note captures author, content, visibility (internal or customer-facing),
and the ticket status at time of writing. Notes display as a running
feed on the ticket detail page with newest first. Internal notes have
a lock icon, customer-visible notes highlighted in blue. Supports add
and delete with appropriate permission gating.

packages/shared/src/schemas/index.ts

@@ -81,6 +81,8 @@ export {
   RepairBatchCreateSchema,
   RepairBatchUpdateSchema,
   RepairBatchStatusUpdateSchema,
+  RepairNoteVisibility,
+  RepairNoteCreateSchema,
   RepairServiceTemplateCreateSchema,
   RepairServiceTemplateUpdateSchema,
 } from './repairs.schema.js'
@@ -93,6 +95,7 @@ export type {
   RepairBatchCreateInput,
   RepairBatchUpdateInput,
   RepairBatchStatusUpdateInput,
+  RepairNoteCreateInput,
   RepairServiceTemplateCreateInput,
   RepairServiceTemplateUpdateInput,
 } from './repairs.schema.js'