Add optional Project Name field to quotes, jobs, and printed documents

- Add ProjectName (nvarchar 100, nullable) to Quote and Job entities;
  migration AddProjectNameToQuotesAndJobs applied
- Add ProjectName to all relevant DTOs: QuoteDto/Create/Update,
  JobDto/List/Create/Update, InvoiceDto (mapped from Job.ProjectName
  via AutoMapper so the invoice PDF picks it up without a separate column)
- Form field added after Customer PO in Quote Create/Edit and Job Create/Edit
- CreateJobFromQuote copies ProjectName from quote to job automatically
- Details views (Quote and Job) display Project when set
- Printable quote PDF: Project row in the quote details block
- Work order: Project row in customer/job info section
- Invoice PDF: Project shown in the Job Reference block alongside Job # and PO #

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Application/Services/PdfService.cs

@@ -217,6 +217,8 @@ public class PdfService : IPdfService
                     c.Item().Text($"Job #: {invoice.JobNumber}");
                     if (!string.IsNullOrWhiteSpace(invoice.CustomerPO))
                         c.Item().Text($"PO #: {invoice.CustomerPO}");
+                    if (!string.IsNullOrWhiteSpace(invoice.ProjectName))
+                        c.Item().Text($"Project: {invoice.ProjectName}");
                 });
             });
 
@@ -609,6 +611,15 @@ public class PdfService : IPdfService
                     row.RelativeItem().Text(quote.CustomerPO).FontSize(9);
                 });
             }
+
+            if (!string.IsNullOrWhiteSpace(quote.ProjectName))
+            {
+                column.Item().Row(row =>
+                {
+                    row.ConstantItem(80).Text("Project:").FontSize(9);
+                    row.RelativeItem().Text(quote.ProjectName).FontSize(9);
+                });
+            }
         });
     }