Add rework pricing type (Fixed vs Per-Item) and inline rework flow on Job Details

Adds a PricingType enum to ReworkRecord (FixedPrice | PerItem), surfaces the
choice in the rework modal on Job Details, and wires the resulting unit/total
price display. Includes migration AddReworkPricingType, updated repository
query for rework history, and help article updates.

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

src/PowderCoating.Infrastructure/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -6711,7 +6711,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 1,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 5, 19, 19, 26, 9, 226, DateTimeKind.Utc).AddTicks(5186),
+                            CreatedAt = new DateTime(2026, 5, 21, 14, 32, 24, 337, DateTimeKind.Utc).AddTicks(8533),
                             Description = "Standard pricing for regular customers",
                             DiscountPercent = 0m,
                             IsActive = true,
@@ -6722,7 +6722,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 2,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 5, 19, 19, 26, 9, 226, DateTimeKind.Utc).AddTicks(5190),
+                            CreatedAt = new DateTime(2026, 5, 21, 14, 32, 24, 337, DateTimeKind.Utc).AddTicks(8542),
                             Description = "5% discount for preferred customers",
                             DiscountPercent = 5m,
                             IsActive = true,
@@ -6733,7 +6733,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 3,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 5, 19, 19, 26, 9, 226, DateTimeKind.Utc).AddTicks(5191),
+                            CreatedAt = new DateTime(2026, 5, 21, 14, 32, 24, 337, DateTimeKind.Utc).AddTicks(8543),
                             Description = "10% discount for premium customers",
                             DiscountPercent = 10m,
                             IsActive = true,
@@ -7990,6 +7990,9 @@ namespace PowderCoating.Infrastructure.Migrations
                     b.Property<int?>("ReworkJobId")
                         .HasColumnType("int");
 
+                    b.Property<int?>("ReworkPricingType")
+                        .HasColumnType("int");
+
                     b.Property<int>("ReworkType")
                         .HasColumnType("int");