feat(reminders): Phase 4 partial — schema + service + validators

Migration 0072 — reminders/interests expansion:
- interests.reminder_note: optional cadence note for the existing
  reminderEnabled+reminderDays flow. Surfaces in notification body
  + inbox row.
- reminders.yacht_id (+ FK + relation): fourth entity link so
  yacht-scoped tasks have a typed home alongside client/interest/berth.
- reminders.fired_at: worker idempotency. Partial index
  idx_reminders_due_unfired drives the scan.

Service + validator updates:
- createReminderSchema / updateReminderSchema accept yachtId.
- assertReminderFksInPort validates yacht ownership against the
  caller's port — defense-in-depth, same shape as other entity FKs.
- createReminder / updateReminder thread yachtId through.

Worker scheduler + CreateReminderDialog yachtId UI deferred. The
existing reminders/reminder-form.tsx already covers the dialog
contract — Phase 4b extends it with yachtId + the per-user
digest_time_of_day picker.

Tests: 1374/1374 passing. tsc clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/validators/reminders.ts

@@ -10,6 +10,8 @@ export const createReminderSchema = z.object({
   clientId: z.string().uuid().optional(),
   interestId: z.string().uuid().optional(),
   berthId: z.string().uuid().optional(),
+  // Phase 4: yacht-linked reminders.
+  yachtId: z.string().uuid().optional(),
 });
 
 export type CreateReminderInput = z.infer<typeof createReminderSchema>;
@@ -23,6 +25,7 @@ export const updateReminderSchema = z.object({
   clientId: z.string().uuid().nullable().optional(),
   interestId: z.string().uuid().nullable().optional(),
   berthId: z.string().uuid().nullable().optional(),
+  yachtId: z.string().uuid().nullable().optional(),
 });
 
 export type UpdateReminderInput = z.infer<typeof updateReminderSchema>;
@@ -40,6 +43,7 @@ export const reminderListQuerySchema = baseListQuerySchema.extend({
   clientId: z.string().uuid().optional(),
   interestId: z.string().uuid().optional(),
   berthId: z.string().uuid().optional(),
+  yachtId: z.string().uuid().optional(),
   dueBefore: z.string().datetime().optional(),
   dueAfter: z.string().datetime().optional(),
 });