Fix CodeQL incomplete URL substring sanitization alert

[m4r1k]

Summary

• Resolves code scanning alert #1 — py/incomplete-url-substring-sanitization
• The assertion "example.com" in result in test_config.py was flagged because substring checks on URLs are unreliable for sanitization. This is a false positive (it's a test, not a security check), but the fix is better anyway: assert the exact URL-encoded avatar parameter instead of a vague domain substring.

Test plan

• TestAvatarUrlAppending tests pass locally (5/5)
• CI passes

🤖 Generated with Claude Code

Summary by CodeRabbit

• Tests

  • Enhanced test accuracy for URL parameter encoding validation.

• Chores

  • Version bumped to 5.1.0-rc0.
  • Expanded continuous integration testing to include Debian 12 and Ubuntu 24.04 environments.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 16363781-992d-42ed-994e-925145127ee9

📥 Commits

Reviewing files that changed from the base of the PR and between 0ecb8db and a5bd3a5.

📒 Files selected for processing (3)

• .github/workflows/integration.yml
• src/eneru/version.py
• tests/test_config.py

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📝 Walkthrough

Walkthrough

Version bump to 5.1.0-rc0 accompanied by CI matrix expansion for Debian 12 and Ubuntu 24.04 testing, and test assertion tightening for URL-encoded query parameter validation.

Changes

Cohort / File(s)	Summary
CI/CD Testing Matrix .github/workflows/integration.yml	Expanded test-deb and test-pip-in-container job matrices to include Debian 12 and Ubuntu 24.04 targets for broader OS compatibility coverage.
Package Version src/eneru/version.py	Updated __version__ from "5.0.0-rc4" to "5.1.0-rc0" for pre-release versioning.
Test Assertion Refinement tests/test_config.py	Tightened test_append_avatar_to_discord assertion to verify exact URL-encoded query parameter value instead of loose substring containment checks.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 A hop through the versions, from rc4 we spring,
To five-point-one-oh with test tightening!
Debian twelve joins the testing spree,
Ubuntu twenty-four bounds so free—
Query params encoded, assertions precise,
Our little release tastes quite nice!

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly addresses the main fix in the PR: replacing a vague substring assertion with an exact URL-encoded parameter assertion to resolve a CodeQL alert.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/codeql-url-substring

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[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.76%. Comparing base (0ecb8db) to head (a5bd3a5).
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #15   +/-   ##
=======================================
  Coverage   58.76%   58.76%           
=======================================
  Files          12       12           
  Lines        2185     2185           
  Branches      445      445           
=======================================
  Hits         1284     1284           
  Misses        774      774           
  Partials      127      127           

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