Fix OAuth redirect URI examples

[zz80900]

What problem does this PR solve?

OAuth/OIDC/GitHub redirect URI examples currently point to /v1/user/oauth/callback/<channel>, but the current auth callback route is /api/v1/auth/oauth/<channel>/callback. The stale examples can cause 404 errors when configuring third-party login providers.

This updates the Docker and administrator configuration examples to match the implemented callback route.

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

Verification

• Searched for stale /v1/user/oauth/callback examples.
• Ran git diff --check.

[coderabbitai]

📝 Walkthrough

Walkthrough

This pull request updates OAuth callback redirect URI paths from the legacy /v1/user/oauth/callback/<channel> format to the new /api/v1/auth/oauth/<channel>/callback format across all authentication documentation, configuration examples, and administrator guides for consistency.

Changes

OAuth callback URL path migration

Layer / File(s)	Summary
Authentication module and configuration examples api/apps/auth/README.md, conf/service_conf.yaml, docker/README.md, docker/service_conf.yaml.template	OAuth redirect_uri paths updated to /api/v1/auth/oauth/<channel>/callback in the auth module documentation and all configuration templates. Docker setup documentation step reference adjusted for numbering consistency.
Administrator configuration reference docs/administrator/configurations/configurations.md	OAuth field description and YAML best-practices examples updated to show the new redirect_uri paths for OAuth2, OIDC, and GitHub providers under the new /api/v1/auth/oauth/ route.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 The auth paths hop along so bright,
From /v1/user/oauth to /api/v1/auth/oauth—what delight!
Through docs and configs, we've aligned the way,
Consistent redirects that guide us to stay!
One channel, one path, one loop at a time,
OAuth flows freshly—now perfectly prime! 🔐

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: updating OAuth redirect URI examples to use the correct callback path.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description check	✅ Passed	The pull request description comprehensively addresses the problem, provides clear context, identifies the outdated URIs and the correct implementation, and documents verification steps performed.

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