feat: detect deployed-image vs catalog-image drift and warn (CashPilot-5wi)

[GeiserX]

What

Detects when a running container's image no longer matches its catalog entry and surfaces an update available badge in the dashboard.

When a provider changes or re-pins its Docker image (the ProxyBase proxybase/proxybase → ghcr.io/proxybaseorg/peer-cli migration is the motivating case), a deployed container keeps reporting healthy while silently running a retired image. The operator has no signal to re-deploy.

How

• _split_image(ref) — parses repo/tag/digest from a Docker ref (a : after the last / is a tag; before it is a registry port).
• _image_outdated(deployed, catalog_image) — True when the repo path changed, or both sides are digest-pinned to different digests. Conservative: empty/unknown images and a pure tag-vs-digest difference of the same repo are not flagged.
• /api/services/deployed now returns image_outdated per container-backed service.
• app.js renders a small update available badge (with an explanatory tooltip) in the status cell.

Tests

TestImageDrift covers _split_image (digest, tag, bare, registry-port) and _image_outdated (repo migration, digest re-pin, identical, empty, tag-vs-digest). Full suite: 1164 passing, ruff clean.

Closes bead CashPilot-5wi.

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Review details

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📥 Commits

Reviewing files that changed from the base of the PR and between 4cbd330 and ce894b6.

📒 Files selected for processing (3)

• app/main.py
• app/static/js/app.js
• tests/test_main_routes.py

✨ Finishing Touches

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• Create PR with unit tests
• Commit unit tests in branch fix/loop-5wi-image-drift

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.87%. Comparing base (4cbd330) to head (ce894b6).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #117      +/-   ##
==========================================
+ Coverage   93.84%   93.87%   +0.02%     
==========================================
  Files          33       33              
  Lines        3884     3902      +18     
==========================================
+ Hits         3645     3663      +18     
  Misses        239      239              

Files with missing lines	Coverage Δ
app/main.py	97.68% <100.00%> (+0.03%)	⬆️

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[GeiserX]

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