feat(activities): attach compressed photos to activity notes

Photos on an activity are shrunk with the form-builder compressor and stored only when they fit under 200KB.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/prisma/schema.prisma

@@ -174,6 +174,7 @@ model Organization {
   products                     Product[]
   notifications                Notification[]
   noteAttachments              NoteAttachment[]
+  activityImages               ActivityImage[]
   leadForms                    LeadForm[]
   quotes                       Quote[]
   invoices                     Invoice[]
@@ -293,6 +294,7 @@ model User {
   notes                  Note[]                   @relation("NoteAuthor")
   noteRevisions          NoteRevision[]           @relation("NoteRevisionEditor")
   noteAttachments        NoteAttachment[]         @relation("NoteAttachmentUploader")
+  activityImages         ActivityImage[]          @relation("ActivityImageUploader")
   notifications          Notification[]
   salesGoals             SalesGoal[]              @relation("SalesGoalUser")
   commissionPercent      Decimal                  @default(0) @db.Decimal(8, 2)
@@ -866,6 +868,7 @@ model Activity {
   /// لید مرتبط (مثلاً فعالیت ساخته‌شده از ارسال فرم)
   leadId            String?
   lead              Lead?            @relation(fields: [leadId], references: [id], onDelete: SetNull)
+  images            ActivityImage[]
   createdAt         DateTime         @default(now())
   updatedAt         DateTime         @updatedAt
 
@@ -884,6 +887,26 @@ model Activity {
   @@index([dealId])
 }
 
+/// عکس فشرده‌شدهٔ یادداشت فعالیت (حداکثر ۲۰۰ کیلوبایت)
+model ActivityImage {
+  id             String       @id
+  organizationId String
+  organization   Organization @relation(fields: [organizationId], references: [id], onDelete: Cascade)
+  activityId     String
+  activity       Activity     @relation(fields: [activityId], references: [id], onDelete: Cascade)
+  fileName       String
+  mimeType       String
+  sizeBytes      Int
+  storageKey     String
+  uploadedById   String?
+  uploadedBy     User?        @relation("ActivityImageUploader", fields: [uploadedById], references: [id], onDelete: SetNull)
+  createdAt      DateTime     @default(now())
+
+  @@index([activityId, createdAt])
+  @@index([organizationId])
+  @@index([uploadedById])
+}
+
 model Note {
   id             String            @id @default(cuid())
   organizationId String