fix(hooks): keep ingest commit status off the drain residual

[ScriptedAlchemy]

Summary

• Cursor and Codex hook ingest now take their terminal status from the admission tally, not from the shared per-scope projection drain.
• A drain residual can no longer promote a pass that persisted nothing into committed, hide a real commit, or invent an exact_duplicate.
• The advisory Codex stop uses the same durable-terminal contract as the Cursor ingest: committed or exact_duplicate, never accepted_for_replay.

Motivation

packaged_host_ingest_delivers_a_registered_advisory_cycle flaked because the hook and the project catch-up drain one queue. Counting observations_committed beside that drain left the residual in the status equation. Leftover rows made a Codex pass that persisted nothing look committed; an empty residual left the peer-won pass as exact_duplicate. The stop assertion required committed, so which drainer won was the flake.

Changes

• account_hook_admission keeps Cursor hook deferral and duplicate evidence on the admission, not the drain.
• ingest_commit_verdict ignores drain messages_upserted when the route's admission owns the commit (Cursor and Codex project). Hermes and other message-counted routes are unchanged.
• Byte-budget deferral still backpressures.
• No CI workflow changes.

Test plan

• cargo test -p tracedecay-sessions --lib runtime::hosts::cursor::tests:: — 13 passed
• cargo test -p tracedecay-mcp --lib hook_runtime::ingest::tests:: — 13 passed
• cargo test -p tracedecay-mcp --lib ingest::kernels::tests — 3 passed
• cargo clippy -p tracedecay-sessions -p tracedecay-mcp --lib -- -D warnings
• Full advisory daemon journey not re-run here; the status contract is covered by the unit tests above

Checklist

• No secrets or credentials
• CHANGELOG not updated (internal status accounting, no user-facing surface change)
• ci.yml untouched; no pull_request trigger added

  

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[ScriptedAlchemy]

Pairs with #1800 (Codex stop accepts peer-won exact_duplicate). Prefer merge order: #1838 (admission owns status) then #1800 (journey accepts terminals), or fold journey into 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 2026-09-19T07:00:38.557421Z	3cb4bc5	Draft marked ready

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