feat: Fixes release build failures and get's release dockerfile working.

Sources/ViewControllerLive/Views/Vendors/VendorForm.swift

@@ -2,7 +2,7 @@ import Elementary
 import ElementaryHTMX
 import SharedModels
 
-struct VendorForm: HTML {
+struct VendorForm: HTML, Sendable {
 
   let context: Context
   var vendor: Vendor? { context.vendor }
@@ -15,7 +15,7 @@ struct VendorForm: HTML {
 
   init() { self.init(.float(nil)) }
 
-  enum Context {
+  enum Context: Sendable {
     case float(Vendor? = nil, shouldShow: Bool = false)
     case formOnly(Vendor)