v9.1.2

• docs: fold 9.1.2 notes for the channel cut
• docs: bind qualification evidence to 9f52116
• docs: bind deep end-to-end rows to 5f5528f
• fix: record one live completion inside each deep case
• docs: bind qualification evidence to 2bd6a23
• fix: replay an identical run-event cursor before chaining
• fix: admit standing context before the first model call
• fix: read the Windows curl fixture on a blocking socket
• ci: keep the Check job inside the hosted disk
• fix: satisfy fmt and clippy on the qualification tip
• fix: keep an explicit remember across stream close
• fix: admit a permission posture on the next fact run
• fix: send user image bytes to the model instead of a size stub
• fix: keep open steps and kept constraints through /compact
• fix: keep standing instructions and open steps across compaction
• fix: show the full completion-gate failure
• ci: publish a3s-effect 0.1.1 so a3s-code-core 9.1.1 can reach crates.io