fix(mount): keep live startup off stale mirrors

[kjgbot]

Summary

• warm daemon and clone-path Relayfile mirrors in the background for long-running Factory start
• keep finite run-once and loop commands on their strict mount preflight
• surface first-launch failures as degraded mount health and arm the existing telemetry-aware retry supervisor

Verification

• targeted CLI and Relayfile mount tests: 119 passed
• TypeScript build
• feature map contract check

Full suite and exact packed-consumer E2E will be attached before this leaves draft.

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📥 Commits

Reviewing files that changed from the base of the PR and between 4e52149 and dae62ef.

📒 Files selected for processing (4)

• src/cli/fleet.test.ts
• src/cli/fleet.ts
• src/mount/relayfile-cloud-mount-client.test.ts
• src/mount/relayfile-cloud-mount-client.ts

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• Commit unit tests in branch fix/background-mount-warmup

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[gemini-code-assist]

Code Review

This pull request modifies the fleet CLI startup process to warm configured clone mounts in the background without blocking the live start, and updates the cloud mount client to handle and retry initial SDK mount failures. The feedback suggests adding a .catch() block to the background warmStartPathMounts call to prevent unhandled promise rejections from potentially crashing the process.

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