feat(cv-search-job): replace MyAiDbContext+ITemplateService with IEmailTemplateService

- Add ProjectReference to email-api-data; remove myai-data reference
- Program.cs: register EmailApiDbContext (no migrate), IEmailTemplateRepository
  (scoped), IEmailTemplateService (singleton); remove MyAiDbContext +
  ITemplateService registrations and their migration call
- CvSearchEmailSender: inject IEmailTemplateService; replace
  _config["Contact:ToEmail"] with GetOperatorCopy("email.search-results.subject")
  for operator copy logic; remove IConfiguration injection
- docker-compose: remove Contact__ToEmail from cv-search-job service block;
  add Database__* env vars to email-api service (needed for EmailApiDbContext)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose/docker-compose.yml

@@ -108,6 +108,13 @@ services:
       - ASPNETCORE_URLS=${ASPNETCORE_URLS:-http://+:8080}
       - APP_ENVIRONMENT_NAME=${APP_ENVIRONMENT_NAME:-myai.staging}
 
+      - Database__Host=${Database__Host:-sqlserver}
+      - Database__Port=${Database__Port:-1433}
+      - Database__Name=${Database__Name:-MyAiDb}
+      - Database__User=${Database__User:-sa}
+      - Database__Password=${Database__Password:-}
+      - Database__TrustServerCertificate=${Database__TrustServerCertificate:-true}
+
       - InternalApi__ApiKey=${EmailApi__InternalApiKey:-}
       - InternalApi__RequireApiKey=true
 
@@ -261,8 +268,6 @@ services:
       - EmailApi__BaseUrl=${EmailApi__BaseUrl:-http://email-api:8080}
       - EmailApi__InternalApiKey=${EmailApi__InternalApiKey:-}
 
-      - Contact__ToEmail=${Contact__ToEmail:-}
-
       - FileStorage__Path=${FileStorage__Path:-Files}
 
       - JobSearch__Enabled=${JobSearch__Enabled:-true}