T3 Code Nightly 0.0.38-nightly.20260901.1246 (b883fc066ea5)

What's Changed

• perf(server): scan only appended transcript bytes for usage summaries by @StiensWout in #9024
• perf(server): cut chatty tool-update frames by 90% by @Adamulek123 in #8368
• fix(server): settle threads server-side by @t3dotgg in #8600
• fix(clients): dedupe skills in composer menus by @Adamulek123 in #8043
• fix(server): stop OpenCode child sessions by @t3dotgg in #9005
• perf(web): defer pull request line stats until visible by @Adamulek123 in #6471
• perf(server): skip full-message reads while streaming by @t3dotgg in #9032
• perf(client-runtime): halve server config bootstrap traffic by @Adamulek123 in #8367

Full Changelog: v0.0.38-nightly.20260901.1245...v0.0.38-nightly.20260901.1246