fix(code-index): keep clone copy off the freshness receipt

[ScriptedAlchemy]

Summary

• Rebased onto master e1300458e4333902b37cd6772e9e5742e0ac885e (fix(sessions): drop the u64 identity conversion clippy rejects #1858). The serving delta is unchanged.
• The publication advance that installs exact and lexical owners no longer copies the prior lexical artifact into the clone successor.
• Freshness can become current once those owners and the graph seat are ready. Clone backfill stays pending and runs on the retained driver after the seat, outside reconcile_in_progress.
• Pairs with fix(code-index): keep sealed generation when freshness proof expires #1818 (c1633dd96bb0f70d89d5a33cc64c3d5c35d71dfa). No file overlap. Neither PR subsumes the other.
• RECEIPT_TIMEOUT is unchanged. This does not touch ci.yml.

Dispatch SHA: 76c58af7e25dde6daa330bab74af5ee281d98c61

Clippy on runs 35442002957 / 35442004499 failed in tracedecay-sessions (u64::try_from of Metadata::len) before this crate was checked. That one-liner is now on master via #1858. This head does not carry a second copy. cargo clippy -p tracedecay-code-index-runtime -p tracedecay-sessions --all-targets --locked -- -D warnings passed on the serving tree this head still has.

Test plan

• lexical_readiness_leaves_the_clone_successor_uncopied and four neighbors — 5 passed. successor filter — 10 passed. Serving sources are byte-identical to that run after this rebase.
• cursor_cas_lost_on_a_partially_covered_window_replays_the_tail — 1 passed on the length line fix(sessions): drop the u64 identity conversion clippy rejects #1858 landed.

Checklist

• CHANGELOG.md updated (under [Unreleased] if no version bump)
• No secrets, credentials, or .env files included
• Breaking changes documented (if any) — none

  

[changeset-bot]

⚠️ No Changeset found

Latest commit: 76c58af

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-19T06:40:50.533183Z	91c4bf9	Draft marked ready

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.

[ScriptedAlchemy]

Folded into #1848 at an earlier head; the commits this branch received afterwards are being reviewed for the next integration batch (ci/pr-batch-e). Leaving open until that batch lands.