Replace default token provider with single-active variant

[maliming]

Replaces ASP.NET Core's DataProtectorTokenProvider<IdentityUser> registered under TokenOptions.DefaultProvider with AbpDefaultTokenProvider (extends AbpSingleActiveTokenProvider, 10-minute lifespan). Challenge tokens from the password flows (RequiresTwoFactor, ShouldChangePasswordOnNextLogin, PeriodicallyChangePassword) become single-active per (user, purpose).

[Copilot]

Pull request overview

This PR changes ABP Identity’s ASP.NET Core integration to replace the default ASP.NET Core Identity "Default" token provider with an ABP single-active implementation, making password-flow “challenge” tokens single-active per (user, purpose) with a short default lifespan.

Changes:

• Register AbpDefaultTokenProvider under TokenOptions.DefaultProvider and introduce AbpDefaultTokenProviderOptions (10-minute default lifespan).
• Add an ASP.NET Core test suite to validate the default-provider override and purpose isolation behavior.
• Add/update Identity documentation explaining token-provider replacements and 2FA token behavior.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
modules/identity/src/Volo.Abp.Identity.AspNetCore/Volo/Abp/Identity/AspNetCore/AbpIdentityAspNetCoreModule.cs	Overrides the "Default" token provider registration to use AbpDefaultTokenProvider.
modules/identity/src/Volo.Abp.Identity.AspNetCore/Volo/Abp/Identity/AspNetCore/AbpDefaultTokenProviderOptions.cs	Adds options type setting provider name and 10-minute token lifespan.
modules/identity/src/Volo.Abp.Identity.AspNetCore/Volo/Abp/Identity/AspNetCore/AbpDefaultTokenProvider.cs	Implements the default provider as a single-active token provider.
modules/identity/test/Volo.Abp.Identity.AspNetCore.Tests/Volo/Abp/Identity/AspNetCore/AbpDefaultTokenProvider_Tests.cs	Adds tests verifying override behavior, defaults, and per-purpose isolation.
docs/en/modules/identity/two-factor-authentication.md	Updates 2FA documentation details (notably authenticator provider behavior and storage format).
docs/en/modules/identity/token-providers.md	Adds new documentation page describing ABP token providers and configuration/invalidation guidance.
docs/en/modules/identity-pro.md	Links the new “Identity Token Providers” documentation page from the module doc index.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.44%. Comparing base (002e9b4) to head (20acbd1).
⚠️ Report is 12 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #25525      +/-   ##
==========================================
- Coverage   49.45%   49.44%   -0.02%     
==========================================
  Files        3671     3673       +2     
  Lines      123912   123921       +9     
  Branches     9474     9474              
==========================================
- Hits        61278    61270       -8     
- Misses      60811    60829      +18     
+ Partials     1823     1822       -1     

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