Deploy rule, CRM enhancements, Company Employee category, bilingual, contacts module completion

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

backend/prisma/schema.prisma

@@ -134,6 +134,7 @@ model Employee {
   
   // Relations
   user              User?
+  contact           Contact?
   attendances       Attendance[]
   leaves            Leave[]
   salaries          Salary[]
@@ -401,6 +402,10 @@ model Contact {
   categories        ContactCategory[]
   tags              String[]
   
+  // HR Link - for Company Employee category
+  employeeId        String?   @unique
+  employee          Employee? @relation(fields: [employeeId], references: [id])
+  
   // Hierarchy - for companies/entities
   parentId          String?
   parent            Contact?  @relation("ContactHierarchy", fields: [parentId], references: [id])
@@ -442,6 +447,9 @@ model Contact {
   @@index([mobile])
   @@index([taxNumber])
   @@index([commercialRegister])
+  @@index([source])
+  @@index([createdAt])
+  @@index([parentId])
   @@map("contacts")
 }