refactor(data): rename email-api-data to email-data for consistent naming

- Rename project folder Apis/email-api-data → Apis/email-data
- Rename csproj file: email-api-data.csproj → email-data.csproj
- Update csproj properties: AssemblyName and RootNamespace (email-data, Email.Data)
- Update C# namespaces: EmailApi.Data → Email.Data across all email-data files
- Update project references in api.csproj and email-api.csproj
- Update migration assembly references in api/Program.cs and email-api/Program.cs
- Update cv-search-job references to use email-data project and Email.Data namespace
- Update solution file to reference new email-data project path
- Remove hardcoded schema name from SmtpEmailDispatcher, use template service instead

This maintains consistency with other data project naming convention (no service-type suffix).
All tests passing, build succeeds.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

Apis/email-data/Services/IEmailTemplateService.cs

@@ -0,0 +1,38 @@
+namespace Email.Data.Services;
+
+/// <summary>
+/// Provides access to localised email templates stored in the <c>emailApi.EmailTemplates</c> table.
+/// Implementations are expected to cache templates and refresh periodically.
+/// </summary>
+public interface IEmailTemplateService
+{
+    /// <summary>
+    /// Returns the template value for the given key and language.
+    /// Falls back to <c>"en"</c> when the requested language has no entry.
+    /// Returns the raw key string when no matching template is found.
+    /// </summary>
+    /// <param name="key">Template key (e.g. <c>"email.match.subject"</c>).</param>
+    /// <param name="language">Two-letter language code (e.g. <c>"en"</c>, <c>"ro"</c>).</param>
+    /// <returns>Template value string.</returns>
+    string Get(string key, string language = "en");
+
+    /// <summary>
+    /// Retrieves the template and substitutes <c>{{placeholder}}</c> tokens with the provided values.
+    /// </summary>
+    /// <param name="key">Template key.</param>
+    /// <param name="language">Two-letter language code.</param>
+    /// <param name="placeholders">Named replacement pairs in the form <c>("name", value)</c>.</param>
+    /// <returns>Rendered template string with all placeholders replaced.</returns>
+    string Render(string key, string language, params (string Key, string Value)[] placeholders);
+
+    /// <summary>
+    /// Returns the operator copy address for the given template key.
+    /// Uses the specific row's <c>OperatorCopy</c> value when non-empty; otherwise falls back
+    /// to the first non-empty <c>OperatorCopy</c> across all cached rows, so future template rows
+    /// with an empty value automatically inherit the globally configured address.
+    /// </summary>
+    /// <param name="key">Template key used to look up the specific row (typically the subject key).</param>
+    /// <param name="language">Two-letter language code.</param>
+    /// <returns>Operator copy email address, or <c>null</c> when none is configured.</returns>
+    string? GetOperatorCopy(string key, string language);
+}