Phase 6: Deprecation cleanup + ConfigurationService MagicWallet

- Mark PurchaseGoldenPackage/VerifyGoldenPackagePurchase RPCs as deprecated
- Mark InitiateBasePackagePayment/VerifyBasePackagePayment RPCs as deprecated
- Remove deprecated SystemConstants from GetAllAsDict/GetAllWithDescriptions helpers
- Add MagicWallet per-package values to ConfigurationService (Multiplier, MaxDeposit, MaxCredit)
- All deprecated constants have zero active code usages — safe dead code

src/CMSMicroservice.Protobuf/Protos/package.proto

@@ -44,14 +44,16 @@ service PackageContract
         };
     };
     
-    // Package Purchase System
+    // Package Purchase System (Legacy — use Customer* RPCs instead)
     rpc PurchaseGoldenPackage(PurchaseGoldenPackageRequest) returns (PurchaseGoldenPackageResponse){
+        option deprecated = true;
         option (google.api.http) = {
             post: "/PurchaseGoldenPackage"
             body: "*"
         };
     };
     rpc VerifyGoldenPackagePurchase(VerifyGoldenPackagePurchaseRequest) returns (VerifyGoldenPackagePurchaseResponse){
+        option deprecated = true;
         option (google.api.http) = {
             post: "/VerifyGoldenPackagePurchase"
             body: "*"
@@ -63,14 +65,16 @@ service PackageContract
         };
     };
     
-    // Base Package Payment (56M)
+    // Base Package Payment (Legacy — migrate to Customer* RPCs, then remove)
     rpc InitiateBasePackagePayment(InitiateBasePackagePaymentRequest) returns (InitiateBasePackagePaymentResponse){
+        option deprecated = true;
         option (google.api.http) = {
             post: "/InitiateBasePackagePayment"
             body: "*"
         };
     };
     rpc VerifyBasePackagePayment(VerifyBasePackagePaymentRequest) returns (VerifyBasePackagePaymentResponse){
+        option deprecated = true;
         option (google.api.http) = {
             post: "/VerifyBasePackagePayment"
             body: "*"