fix(mount): complete full-root initial synchronization

[miyaontherelay]

Summary

• require the detached initial Relayfile materialization to complete its full traversal before reporting readiness
• use the supported bootstrap read-concurrency ceiling for the foreground readiness barrier while leaving the daemon default unchanged
• preserve transport failures from mount-path creation and readiness polling for caller retry classification

Verification

• full sandbox test suite: 804 passed, 15 intentionally skipped, 0 failed (819 total)
• git diff --check: clean

This is a dev-path repair only. It does not deploy, provision a provider, or change production configuration.

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 60eb9068-707d-4e88-a3ba-da03cb63bc32

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[cubic-dev-ai]

No issues found across 2 files

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[miyaontherelay]

Review-only head update:

• exact head: 4d49b32
• GitHub reports CLEAN / MERGEABLE
• CI is green with 0 failed and 0 pending checks
• Cubic reviewed this exact head and reported no issues; focused cross-repo review is in progress

No merge, deployment, provider run, spend, or production/configuration change was performed.

[miyaontherelay]

Exact-head review update for d424e1816410d665a2a318f51a03b0614c5b5cb3:

• verifies every exact-layout root's public Relayfile state after --once
• missing, malformed, or still-bootstrapping state fails closed with resumable TEMPFAIL 75
• daemon start is suppressed until persisted readiness is complete
• full local test suite PASS; focused mount/orchestrator tests 49/49 PASS; changed source typecheck PASS
• independent diff review: PASS, no concrete findings

No deploy, provider launch, paid run, production/config/secret/cap change, or merge performed. Literal dev convergence remains unproven.

@codex review

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[cubic-dev-ai]

All reported issues were addressed across 4 files (changes from recent commits).

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[miyaontherelay]

Exact-head correction update for 31b651dd4440da38be964cea335ee62433c31ecc:

• strict JSON parsing now fails closed on success-shaped truncated state
• readiness validation explicitly checks its guest Node prerequisite
• exit 69/75 is contained in a subshell, preserving lifecycle continueOnInitialSyncFailure
• duplicate TEMPFAIL 75 detail removed
• added missing-Node, truncated-JSON, and real POSIX lifecycle continuation regressions
• full local suite PASS; focused changed-source typecheck PASS; independent re-review PASS with no correctness/security findings

No merge, deploy, provider launch, paid run, production/config/secret/cap change performed. Literal dev convergence remains unproven.

[miyaontherelay]

Final exact-head status for 31b651dd4440da38be964cea335ee62433c31ecc: GitHub reports CLEAN / MERGEABLE; Build & Test, CodeRabbit, and Cubic all SUCCESS. Cubic reports all prior findings addressed. No merge, deployment, provider run, spend, or production/configuration change was performed.