Address urgent pull request review and security issues

[d-ulker]

This pull request contains changes generated by Cursor background composer.

Summary by Sourcery

Standardize error responses to use 403 Forbidden, adjust summarization tests for validation, and update CI Python versions.

Bug Fixes:

• Change authentication and token endpoints to return 403 Forbidden instead of 401 Unauthorized for invalid credentials

CI:

• Update GitHub Actions Python version matrix to support 3.10, 3.11, and 3.12 (dropping 3.8 and 3.9)

Tests:

• Expand summarization tests with text inputs exceeding 50 characters to satisfy validation rules

[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
_{Learn more about Cursor Agents}

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Standardize forbidden status codes for authentication errors, extend summarization test inputs to satisfy validation, and refresh CI matrix to modern Python versions.

Sequence diagram for updated authentication error handling

sequenceDiagram
participant Client
participant API
participant AuthModule
Client->>API: Send request with Authorization header
API->>AuthModule: Validate credentials
alt Invalid scheme or credentials
    AuthModule-->>API: Raise HTTP 403 Forbidden
    API-->>Client: Respond with 403 Forbidden
else Valid credentials
    AuthModule-->>API: Return user info
    API-->>Client: Respond with success
end

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File-Level Changes

Change	Details	Files
Standardize HTTP error codes from 401 to 403 for auth and token endpoints	Replaced 401_UNAUTHORIZED with 403_FORBIDDEN on invalid bearer scheme Replaced 401_UNAUTHORIZED with 403_FORBIDDEN on credential validation failure Replaced 401_UNAUTHORIZED with 403_FORBIDDEN on JWT validation failure Replaced 401_UNAUTHORIZED with 403_FORBIDDEN on invalid refresh token	src/security/auth.py src/unified_ai_api.py
Extend summarize endpoint test payloads to exceed minimum length requirements	Use longer text string exceeding 50 characters in summarize integration tests Apply same longer text in both success and error-handling test suites	tests/test_model_integration.py tests/test_summarize_endpoint.py tests/test_api_integration.py
Update CI workflow Python version matrix	Removed Python 3.8 and 3.9 entries Added Python 3.12 to the test matrix	.github/workflows/quality.yml

Possibly linked issues

• upload hf model script + env examples #56: The PR implements security fixes by changing HTTP status codes and updates test strings, directly addressing the 'docs+tests: security fixes/review' item in the issue's checklist.

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[deepsource-io]

Here's the code health analysis summary for commits 7e5115c..45855c3. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Test coverage	⚠️ Artifact not reported	Timed out: Artifact was never reported	View Check ↗
Python	❌ Failure	❗ 27 occurences introduced 🎯 23 occurences resolved	View Check ↗
Terraform	✅ Success		View Check ↗
Secrets	✅ Success		View Check ↗
Shell	✅ Success		View Check ↗
Docker	✅ Success		View Check ↗

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[d-ulker]

Closing urgent security issues draft - Security improvements have been systematically addressed through fortress system and Phase 3A extractions. API rate limiter (PR #180) includes comprehensive security features.