docs: archive completed ML model training feature

[deshanekanayaka]

Summary

• Moves "ML model training and evaluation" (PRs feat(ml): build the 14-feature model input vector #19-feat(ml): persist trained model + add run-everything script and README #26) into context/progress.md
• Marks context/current-feature.md Done
• Clears context/tasks.md — next feature not yet decided

Docs only, no code changes.

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Project	Deployment	Actions	Updated
diacify	Error		Sep 1, 2026 2:28pm UTC

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[deshanekanayaka]

Superseded by #37 — this branch predates the entire 'Backend API design' feature and now conflicts with main on all three files it touches. The one fact it carried that main was still missing (the ML model training progress.md line) has been ported forward in #37.