refactor(db): migrate AI interaction history

Move append-only AI results into an additive provider-aware migration. Preserve generated content, usage counters, indexes, and application cascade semantics.

JobTrackerApi/Services/StartupSchemaOwnership.cs

@@ -13,6 +13,7 @@ internal static class StartupSchemaOwnership
         "AccountDeletionRequests",
         "AiUsageRecords",
         "AiWorkspaceNotes",
+        "AiInteractions",
         "Attachments",
         "Companies",
         "Correspondences",
@@ -43,7 +44,6 @@ internal static class StartupSchemaOwnership
 
     internal static readonly IReadOnlySet<string> ReconcilerOwnedTables = new HashSet<string>(StringComparer.Ordinal)
     {
-        "AiInteractions",
         "ApplicationChecklistItems",
         "AspNetRoleClaims",
         "AspNetRoles",
@@ -67,5 +67,5 @@ internal static class StartupSchemaOwnership
     // Historical migrations contain guarded compatibility bootstraps for these tables so direct
     // EF tooling can traverse the chain. Their current creation owner remains the reconciler.
     internal static readonly IReadOnlySet<string> MigrationCompatibilityBootstrapTables =
-        new HashSet<string>(StringComparer.Ordinal) { "AiInteractions", "AspNetUsers" };
+        new HashSet<string>(StringComparer.Ordinal) { "AspNetUsers" };
 }