2026.2.11.1

What's Changed

• perf(stack): batch commit info fetching with single git log call by @jd in #958
• perf(stack): single git push for all branches by @jd in #959
• perf(stack): concurrent PR create/update with event coordination by @jd in #960
• perf(stack): concurrent comment updates with asyncio.gather by @jd in #961
• feat(stack): add open command to open PR in browser by @JulianMaurin in #952

Full Changelog: 2026.2.4.1...2026.2.11.1