feat(dataaccess): add GIW connection factory method

Add CreateGiwConnectionAsync to IDbConnectionFactory and DbConnectionFactory
for connecting to the GIW Oracle database. This connection is needed for the
StatusCode data sync pipeline.

- Reuses existing CreateOracleConnectionAsync helper with "GIW" data source
- Follows same pattern as JDE, JDEStage, and CMS connections
- Includes 4 unit tests covering missing/empty/invalid connection strings

NEW/src/JdeScoping.DataAccess/DbConnectionFactory.cs

@@ -87,6 +87,12 @@ public class DbConnectionFactory : IDbConnectionFactory
         return await CreateOracleConnectionAsync("CMS", ct).ConfigureAwait(false);
     }
 
+    /// <inheritdoc/>
+    public async Task<OracleConnection> CreateGiwConnectionAsync(CancellationToken ct = default)
+    {
+        return await CreateOracleConnectionAsync("GIW", ct).ConfigureAwait(false);
+    }
+
     private async Task<OracleConnection> CreateOracleConnectionAsync(string dataSource, CancellationToken ct)
     {
         var connectionString = _configuration.GetConnectionString(dataSource);

NEW/src/JdeScoping.DataAccess/Interfaces/IDbConnectionFactory.cs

@@ -35,4 +35,11 @@ public interface IDbConnectionFactory
     /// <param name="ct">Cancellation token.</param>
     /// <returns>An open Oracle connection. Caller is responsible for disposal.</returns>
     Task<OracleConnection> CreateCmsConnectionAsync(CancellationToken ct = default);
+
+    /// <summary>
+    /// Creates and opens a connection to the GIW Oracle database (for StatusCode sync).
+    /// </summary>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>An open Oracle connection. Caller is responsible for disposal.</returns>
+    Task<OracleConnection> CreateGiwConnectionAsync(CancellationToken ct = default);
 }