v0.2.4

What's Changed

• claude: deterministic per-turn reporting via Stop/MessageDisplay hooks by @kecbigmt in #556
• docs: define minimum cleanup contract by @kecbigmt in #537
• Move session sidecars into SQLite by @kecbigmt in #538
• web: render plect.message/plect.message_delta in the conversation view by @kecbigmt in #564
• service: require an existing session for event publish and stub destroy by @kecbigmt in #562
• task, persistence: preserve execution generations across rebuilds and concurrent setup by @kecbigmt in #567
• slack: stream channel rendering plect.message_delta via chat.startStream/appendStream/stopStream by @kecbigmt in #565
• codex: emit plect.message from exec_runtime instead of codex.reply by @kecbigmt in #563
• dispatch: relay plect.channel.error to other channels, not the failing one by @kecbigmt in #570
• codex: fix teardown race in codex-exec-worker selftest by @kecbigmt in #572
• claude: fix duplicate plect.message from MessageDisplay/Stop race by @kecbigmt in #578

Full Changelog: v0.2.3...v0.2.4