docs(ci): scope the native-app target dir comment to the measurement

[hyperb1iss]

🔍 What this corrects

The comment merged in #146 says the Tauri bundle step "recompiled the whole dependency tree." The sampled runs say a third of it: 157 of roughly 475 crates on both macOS targets. The rest is the Tauri app's own graph (tauri, wry, the platform bindings), which the sidecar build never compiles, so no target directory arrangement can recover it.

The distinction matters because the unmeasured version is exactly what sold #146 as a speedup before the numbers came back flat. The comment now states what was measured and what it buys: less duplicated work, not less wall time.

No behavior change; comment only.

🧪 Verification

actionlint clean.

Summary by CodeRabbit

• Documentation
  • Clarified the native app build workflow’s optimization, including reduced redundant compilation of shared components.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: d039ed9c-9bc4-4959-9c93-44a429439271

📥 Commits

Reviewing files that changed from the base of the PR and between 29439ce and 3997832.

📒 Files selected for processing (1)

• .github/workflows/ci.yml

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📝 Walkthrough

Walkthrough

The CI workflow comment now quantifies crate reuse from the shared CARGO_TARGET_DIR and clarifies compilation of the remaining app-specific graph.

Changes

CI documentation

Layer / File(s)	Summary
Clarify Cargo target reuse .github/workflows/ci.yml	The CARGO_TARGET_DIR comment states that 157 of approximately 475 sidecar-related crates avoid rebuilding and that the remaining app graph compiles once.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• hyperb1iss/hypercolor#146: Updates the same CI workflow comment to document the shared CARGO_TARGET_DIR change.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the CI comment update and its measurement scope.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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