refactor(db): migrate Identity schema

Complete schema ownership by moving all ASP.NET Identity tables to an additive provider-aware migration. Preserve credentials, security state, preferences, roles, claims, external logins, tokens, indexes, and cascades.

JobTrackerApi/Services/StartupSchemaOwnership.cs

@@ -15,6 +15,13 @@ internal static class StartupSchemaOwnership
         "AiWorkspaceNotes",
         "AiInteractions",
         "ApplicationChecklistItems",
+        "AspNetRoleClaims",
+        "AspNetRoles",
+        "AspNetUserClaims",
+        "AspNetUserLogins",
+        "AspNetUserRoles",
+        "AspNetUsers",
+        "AspNetUserTokens",
         "Attachments",
         "CareerCertifications",
         "CareerEducations",
@@ -53,19 +60,10 @@ internal static class StartupSchemaOwnership
         "UserSessions",
     };
 
-    internal static readonly IReadOnlySet<string> ReconcilerOwnedTables = new HashSet<string>(StringComparer.Ordinal)
-    {
-        "AspNetRoleClaims",
-        "AspNetRoles",
-        "AspNetUserClaims",
-        "AspNetUserLogins",
-        "AspNetUserRoles",
-        "AspNetUsers",
-        "AspNetUserTokens",
-    };
+    internal static readonly IReadOnlySet<string> ReconcilerOwnedTables = new HashSet<string>(StringComparer.Ordinal);
 
     // Historical migrations contain guarded compatibility bootstraps for these tables so direct
-    // EF tooling can traverse the chain. Their current creation owner remains the reconciler.
+    // EF tooling can traverse the chain. The later adoption migration is the current owner.
     internal static readonly IReadOnlySet<string> MigrationCompatibilityBootstrapTables =
         new HashSet<string>(StringComparer.Ordinal) { "AspNetUsers" };
 }