Remove deprecated Coana workflows

[gjtorikian]

Summary

• Removes coana-analysis.yml and coana-guardrail.yml workflow files
• Coana is being deprecated and these workflows are no longer functional or needed

Test plan

• Verify no other workflows depend on these files

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

Removes the two Coana GitHub Actions workflow files (coana-analysis.yml and coana-guardrail.yml). The remaining workflows (ci.yml, release.yml) have no references to Coana, confirming a clean removal with no broken dependencies.

Confidence Score: 5/5

• This PR is safe to merge — it is a pure deletion of deprecated workflow files with no remaining dependencies.
• Both deleted files are self-contained GitHub Actions workflows. No other workflow or source file references Coana, and the COANA_API_KEY secret is no longer consumed anywhere. There are no logic issues, no security concerns, and no broken cross-file dependencies.
• No files require special attention.

Important Files Changed

Filename	Overview
.github/workflows/coana-analysis.yml	Scheduled daily vulnerability analysis workflow using Coana CLI — deleted cleanly with no remaining references.
.github/workflows/coana-guardrail.yml	PR-triggered guardrail workflow that ran Coana on both base and head branches to diff vulnerability reports — deleted cleanly with no remaining references.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Pull Request / Schedule trigger] -->|previously ran| B[coana-analysis.yml\nDaily scheduled scan]
    A -->|previously ran| C[coana-guardrail.yml\nPR vulnerability diff]
    B -->|used| D[COANA_API_KEY secret]
    C -->|used| D
    B -.->|DELETED| E[❌ Removed]
    C -.->|DELETED| E
    F[ci.yml] -->|still active| G[✅ CI checks]
    H[release.yml] -->|still active| I[✅ Release pipeline]

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_{Reviews (1): Last reviewed commit: "Remove Coana workflow files" | Re-trigger Greptile}