chore: sync public mirror from internal

[evalops-mirror]

Summary

• sync the sanitized public tree from dx-corp/mono
• keep dx-corp/code as a generated public mirror of the private source of truth
• preserve public-owned CI and trusted-publishing workflows from the public checkout
• internal source SHA: 4c3e830640c4066c99303b7582fa2bdb74095f0d
• last generated public sync base: ca90e530cac35a9d63eac51f920d58891a511b21
• previewed public-tree drift: 14 file(s) to copy/update and 0 stale file(s) to delete
• public-only commits since last generated sync: 0
• to pause generated syncs while hand-editing this branch, apply the sync-hold label to this PR; the sync workflow skips every push while it is set

Source-of-truth status

Projection: deixic-code

• Source: dx-corp/mono@4c3e830640c4066c99303b7582fa2bdb74095f0d

• Prior destination base: ca90e53

• Content SHA-256: f684b3dd9cbf2e4f672beaa7d0c536d87035881e1cdb7f5d28afeebe1e49b530

• Result: drift_detected; 14 changed, 0 deleted

• Destination-owned content is preserved. Destination CI is a separate health signal.

• copy/update .repository-projection.json

• copy/update packages/dex-host-rs/src/model.rs

• copy/update packages/dex-host-rs/src/turn.rs

• copy/update packages/dex-host-rs/tests/turn.rs

• copy/update vendor/dex-loop/src/engine.rs

• copy/update vendor/dex-loop/src/event.rs

• copy/update vendor/dex-loop/src/lib.rs

• copy/update vendor/dex-loop/src/ports.rs

• copy/update vendor/dex-loop/tests/prefetch.rs

• copy/update vendor/dex-loop/tests/prefetch_authority.rs

• copy/update vendor/dex-loop/tests/scenarios.rs

• copy/update vendor/dex-loop/tests/sim/fakes.rs

• copy/update vendor/dex-loop/tests/support/mod.rs

• copy/update vendor/dex-loop/tests/tool_deadline.rs

Drift sample

• copy/update .repository-projection.json
• copy/update packages/dex-host-rs/src/model.rs
• copy/update packages/dex-host-rs/src/turn.rs
• copy/update packages/dex-host-rs/tests/turn.rs
• copy/update vendor/dex-loop/src/engine.rs
• copy/update vendor/dex-loop/src/event.rs
• copy/update vendor/dex-loop/src/lib.rs
• copy/update vendor/dex-loop/src/ports.rs
• copy/update vendor/dex-loop/tests/prefetch.rs
• copy/update vendor/dex-loop/tests/prefetch_authority.rs
• copy/update vendor/dex-loop/tests/scenarios.rs
• copy/update vendor/dex-loop/tests/sim/fakes.rs
• copy/update vendor/dex-loop/tests/support/mod.rs
• copy/update vendor/dex-loop/tests/tool_deadline.rs

Public-only commits since last generated sync

• none detected since last generated sync

Validation

• generated by the sync-public-release-mirror workflow in public-tree mode

Test Plan

• generated by the maestro-sync-public-release-mirror workflow in public-tree mode
• public-source-provenance require-internal-pr confirms internal source PR lineage
• generated mirror PRs use the slim public CI path (fmt/clippy/smoke + provenance); full cargo test/evals already ran on internal main for this SHA
• bot review threads on generated mirror PRs are advisory and do not block the next sync update

Staged Rollout

• Staging is unnecessary for this generated mirror PR: it does not independently promote user-visible behavior. It mirrors already-reviewed internal source from dx-corp/mono@4c3e830640c4066c99303b7582fa2bdb74095f0d, including existing hidden/evaluation surfaces, and keeps public package parity behind the established public-source-provenance gate.

[evalops-mirror]

Resolved 0 review-bot thread(s) on this generated public mirror PR.
Left 0 human-started thread(s) unresolved.

Review of mirrored code belongs on the mono source PR.
See https://github.com/dx-corp/mono/issues/9100 for the triage pattern.

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: a3b0bfffc6

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[chatgpt-codex-connector]

Poll pending prefetched reads before finishing completed siblings

When one prefetched read has already completed but a later sibling is still pending and holds the thread's log-row lock (for example, while emitting tool progress), this branch appends ToolFinished through the new empty running handle before line 1374 moves that sibling into it. The append waits on the lock while the pending prefetch is no longer polled to release it, so Engine::run deadlocks. The removed outer prefetch.reads.drive(self.dispatch(...)) previously kept all prefetched reads progressing during this append; move pending prefetch futures into running before finishing adopted results, or preserve that outer driver.

Useful? React with 👍 / 👎.