Replace hardcoded "cvSearch" string literals with MigrationConstants.SchemaName
in the Up, InsertData, and Down methods, consistent with all other migrations.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
New JobProviderEntity persists provider config (name, URL template,
link filter, initial keywords, max results, display order) in the DB
instead of appsettings. Migration seeds three disabled defaults:
ejobs.ro, bestjobs.eu, and linkedin.com.
Closes#35
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>