DO NOT MERGE feat: matrix testing

[matmair]

Adds a CI step for python 3.14 to ensure upstream compability.

[netlify]

✅ Deploy Preview for inventree-web-pui-preview ready!

Name	Link
🔨 Latest commit	3516a49
🔍 Latest deploy log	https://app.netlify.com/projects/inventree-web-pui-preview/deploys/694a64a6adab6400088008d8
😎 Deploy Preview	https://deploy-preview-10904--inventree-web-pui-preview.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 94 (no change from production) Accessibility: 81 (no change from production) Best Practices: 100 (no change from production) SEO: 78 (no change from production) PWA: - View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.18%. Comparing base (97dd664) to head (3516a49).

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #10904   +/-   ##
=======================================
  Coverage   88.18%   88.18%           
=======================================
  Files        1290     1290           
  Lines       58142    58142           
  Branches     1969     1969           
=======================================
  Hits        51272    51272           
  Misses       6379     6379           
  Partials      491      491           

Flag	Coverage Δ
backend	89.48% <ø> (ø)
migrations	42.44% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
Backend Apps	92.02% <ø> (ø)
Backend General	93.48% <ø> (ø)
Frontend	70.85% <ø> (ø)

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[matmair]

DO NOT MERGE; removes security feature