[PM-35680] chore: Convert Fido2CredentialStore to AutoMockable

[matt-livefront]

🎟️ Tracking

PM-35680

📔 Objective

Updates Fido2CredentialStore to AutoMockable.

[github-actions]

🤖 Bitwarden Claude Code Review

Overall Assessment: APPROVE

Reviewed the conversion of Fido2CredentialStore from the bespoke MockFido2CredentialStore to a Sourcery AutoMockable-generated mock. The change deletes the hand-written mock, registers the SDK type in the AutoMockable extension file, and migrates test call sites to the generated ReturnValue/ThrowableError/Called conventions. No production code is affected.

Code Review Details

No findings. Verification notes:

• extension Fido2CredentialStore {} is correctly placed in alphabetical order in BitwardenSdkMocks.swift.
• Test migrations map correctly: allCredentialsResult/findCredentialsResult → *ReturnValue/*ThrowableError, and saveCredentialError → saveCredentialThrowableError. The preserved saveCredentialCalled assertion matches the AutoMockable-generated Called flag.
• import BitwardenSdkMocks was added only to test files that previously lacked it; files already importing it (e.g. AutofillCredentialServiceTests, VaultAutofillListProcessor+Fido2Tests) were correctly left untouched.
• The remaining findCredentialsResult references in Fido2CredentialStoreServiceTests belong to Fido2DebuggingReportBuilder's report object, not the mock, and are correctly unchanged.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.54%. Comparing base (f5067ec) to head (8045ba0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2804      +/-   ##
==========================================
- Coverage   80.80%   78.54%   -2.27%     
==========================================
  Files        1019     1142     +123     
  Lines       64849    72145    +7296     
==========================================
+ Hits        52402    56663    +4261     
- Misses      12447    15482    +3035     

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