refactor(configmanager): migrate to per-file pipeline system

Align ConfigManager with DataSync's per-file pipeline format (pipeline.*.json)
by reusing EtlPipelineConfig types directly, eliminating duplicate models and
simplifying the codebase. Removes ~3200 lines of obsolete code.

NEW/tests/JdeScoping.DataSync.Tests/WorkProcessorTests.cs

@@ -2,6 +2,10 @@ using System.Diagnostics.Metrics;
 using JdeScoping.Core.Interfaces;
 using JdeScoping.Core.Models.Enums;
 using JdeScoping.Core.Models.Search;
+using JdeScoping.DataSync.Configuration;
+using EtlPipelineConfig = JdeScoping.DataSync.Configuration.EtlPipelineConfig;
+using SourceElement = JdeScoping.DataSync.Configuration.SourceElement;
+using DestinationElement = JdeScoping.DataSync.Configuration.DestinationElement;
 using JdeScoping.DataSync.Contracts;
 using JdeScoping.DataSync.Models;
 using JdeScoping.DataSync.Options;
@@ -655,15 +659,15 @@ public class WorkProcessorTests
             SourceData = tableName.ToUpper(),
             UpdateType = updateType,
             MinimumDt = null,
-            Config = new DataSourceConfig
+            Pipeline = new EtlPipelineConfig
             {
-                TableName = tableName,
-                SourceSystem = "JDE",
-                SourceData = tableName.ToUpper(),
+                Name = tableName,
                 IsEnabled = true,
-                MassConfig = new ScheduleConfig { Enabled = true, IntervalMinutes = 10080 },
-                DailyConfig = new ScheduleConfig { Enabled = true, IntervalMinutes = 1440 },
-                HourlyConfig = new ScheduleConfig { Enabled = true, IntervalMinutes = 60 }
+                MassSyncIntervalMinutes = 10080,
+                DailySyncIntervalMinutes = 1440,
+                HourlySyncIntervalMinutes = 60,
+                Source = new SourceElement { Connection = "JDE", Query = "SELECT 1" },
+                Destination = new DestinationElement { Table = tableName, MatchColumns = ["Id"] }
             }
         };
     }