Add member identifiers table for ID documents (DL, passport, school ID)

member_identifier table with type, value, issuing authority, expiry,
front/back image storage (base64 in Postgres), primary flag. CRUD
endpoints under /members/:memberId/identifiers. Zod schemas with
constrained type enum.

packages/backend/src/db/schema/accounts.ts

@@ -62,6 +62,31 @@ export const members = pgTable('member', {
   updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
 })
 
+export const memberIdentifiers = pgTable('member_identifier', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  memberId: uuid('member_id')
+    .notNull()
+    .references(() => members.id),
+  companyId: uuid('company_id')
+    .notNull()
+    .references(() => companies.id),
+  type: varchar('type', { length: 50 }).notNull(),
+  label: varchar('label', { length: 100 }),
+  value: varchar('value', { length: 255 }).notNull(),
+  issuingAuthority: varchar('issuing_authority', { length: 255 }),
+  issuedDate: date('issued_date'),
+  expiresAt: date('expires_at'),
+  imageFront: text('image_front'),
+  imageBack: text('image_back'),
+  notes: text('notes'),
+  isPrimary: boolean('is_primary').notNull().default(false),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
+})
+
+export type MemberIdentifier = typeof memberIdentifiers.$inferSelect
+export type MemberIdentifierInsert = typeof memberIdentifiers.$inferInsert
+
 export const processorEnum = pgEnum('payment_processor', ['stripe', 'global_payments'])
 
 export const accountProcessorLinks = pgTable('account_processor_link', {