Fix duplicate changedOrderToJob migration blocking build

Two divergent copies of this branch each independently regenerated an
EF migration named changedOrderToJob, and merging both left two files
with the same C# class name (compile error) plus an orphaned
fixedOrderCustomerID migration referencing the already-renamed orders
table. Removed the dead/unapplied migrations, committed the two
migrations already live on the shared dev DB, and added
FixJobsCustomerIdType to bring jobs.customer_id in line with the model
(text -> integer) using an explicit USING cast.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

barkmanAPI/Program.cs

@@ -290,6 +290,7 @@ jobGroup.MapPost("", async (Jobs newJobInput, BarkContext db) =>
         EndDate = newJobInput.EndDate,
         Venue = newJobInput.Venue,
         Address = newJobInput.Address,
+        Notes = newJobInput.Notes,
     };
 
     db.Jobs.Add(newJob);
@@ -370,7 +371,7 @@ jobItemGroup.MapPut("/{id}", async (int id, JobItems updatedJobItems, BarkContex
         return Results.NotFound(new { Message = "Job Items not found" });
     }
 
-    existingJobItems.OrderId = updatedJobItems.OrderId;
+    existingJobItems.JobId = updatedJobItems.JobId;
     existingJobItems.ItemId = updatedJobItems.ItemId;
     existingJobItems.Quantity = updatedJobItems.Quantity;
     
@@ -382,7 +383,7 @@ jobItemGroup.MapPost("", async (JobItems newJobItemsInput, BarkContext db) =>
 {
     var newJobItem = new JobItems()
     {
-        OrderId = newJobItemsInput.OrderId,
+        JobId = newJobItemsInput.JobId,
         ItemId = newJobItemsInput.ItemId,
         Quantity = newJobItemsInput.Quantity,
     };