Fix Application.providers field type: List<String> → List<ProviderItem>

[Copilot]

Application.providers was typed as List<String>, causing the Go backend to reject create/update requests with json: cannot unmarshal string into Go struct field Application.providers of type object.ProviderItem.

Changes

• New ProviderItem entity — mirrors the Go ProviderItem struct with fields owner, name, canSignUp, canSignIn, canUnlink, countryCodes, prompted, signupGroup, rule, and a nested Provider provider
• Application.providers — changed from List<String> to List<ProviderItem>
• Removed Application.providerObjs — this List<Provier> field had no matching field in the Go struct and is superseded by the corrected providers

Usage

ProviderItem item = new ProviderItem("admin", "my-google-provider");
item.canSignUp = true;
item.canSignIn = true;

Application app = new Application("admin", "my-app", ...);
app.providers = List.of(item);
applicationService.addApplication(app);

Original prompt

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This section details on the original issue you should resolve

<issue_title>To create a new application using SDK (version 1.42.0) but fail</issue_title>
<issue_description>To create a new application using SDK (version 1.42.0), you need to pass the parameter 'providers', which is of type List. What are the parameters passed? I have tried passing List. of (name) and JSON provider object, but both have encountered an error message: "json: cannot unmarshal string into Go struct field Application. supporters of type object. ProviderItem." What exactly is being passed? @hsluoyz </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes To create a new application using SDK (version 1.42.0) but fail #125

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[hsluoyz]

@weiweiou

[codecov]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (75e5a4c) to head (5d605c9).

Files with missing lines	Patch %	Lines
...n/java/org/casbin/casdoor/entity/ProviderItem.java	0.00%	6 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##           master    #126   +/-   ##
======================================
  Coverage    0.00%   0.00%           
======================================
  Files          94      95    +1     
  Lines        1397    1403    +6     
  Branches       36      36           
======================================
- Misses       1397    1403    +6     

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[weiweiou]

please ~ not successful ！

[weiweiou]

Please as soon as possible, I'm waiting for the update @hsluoyz

[hsluoyz]

@weiweiou do you have AI? Can you make a PR instead?

[weiweiou]

how？add providerItem.class and change provider.class ? use claude code ？@hsluoyz