Integrated work, 2026-10-14

[pathscale]

Local master commits not yet on GitHub, for review before merge. Integrated and gated locally (cargo check, clippy -D warnings, the repo's ps-qa/witness checks where named in each commit). Linear, no merge commits.

0.1.17 was published to crates.io from a local cargo publish before this review (process error, now forbidden). This PR is that exact source. If review finds a problem, yank 0.1.17.

Before merge: ps-st3 uses path = "../ps-st3" but ps-st3 0.6.3 is on crates.io; drop the path.

Risk: mostly additive and opt-in (owner turns, CPU credits, readiness reasons, all-core install). One behaviour change on every reactor timer: src/reactor/driver.rs next-deadline now uses fetch_min instead of a plain store.

Commits:

• 9c3274c Add all-core runtime installation
• 98f69d9 Add typed exclusive owner turns
• 2e137f6 Add shared CPU credit accounting
• 173c530 Bind timers to the shared readiness host
• 37a0d7d Add retained readiness reasons
• 2cf6800 Add the agent pool functional witness
• 0ea4ed8 Add reactive credit waits
• d5243a2 Format agent pool code and gate reactor wake routing
• 212c9f7 Use explicit unsafe blocks in sockets
• 956cf40 Return reactor read result directly
• 8b13320 Exclude repository workflows from the crate