M12 — Example set rewrite (18 examples)

[nficano]

Goal

Example set rewrite (18 examples).

Files

• Delete examples/* entries from Cargo.toml:80-122 and the 14 directory/file targets
• Add 36 [[example]] blocks per Phase 6 §2
• Create examples/{submit-and-stream,delegate,resume,idempotent-retry,lease-violation,cancel,stdio,vendor-extensions,custom-auth,heartbeat,ack-backpressure,list-jobs,subscribe,agent-versions,lease-expires-at,cost-budget,progress,result-chunk}/
• CI gate: cargo check --examples and per-example smoke runs in CI

Spec §

All §13.x example flows

Depends on

M11