Release v0.15.3

Changes from 0.15.2 to 0.15.3

What's Changed

• fix(updater): harden auto-update execution and release gating by @cpacker in #976
• fix(retry): add ChatGPT connection error patterns to retriable error detection by @jnjpng in #977
• fix(retry): broaden ChatGPT error pattern to catch all ChatGPT API errors by @jnjpng in #978
• fix: expand chatgpt oauth retry classification by @cpacker in #980
• fix: drop option for max turns from task by @cpacker in #982
• fix: block slash command queueing while agent is running by @cpacker in #983
• fix(cli): reset interrupt timer on eager cancel by @cpacker in #984
• fix: reconcile memfs/standard prompt sections safely by @cpacker in #985
• feat: expose MEMORY_DIR and AGENT_ID in runtime context by @cpacker in #986
• fix: clean up AGENT_ID and MEMORY_DIR prompt placement by @cpacker in #988
• fix: gate skills reminders in headless sessions by @cpacker in #987

Full Changelog: v0.15.2...v0.15.3