v0.8.5

Rebuilds billing on Go 1.27.4, which fixes a crash in HTTP servers that limit request body size, as the billing MCP server does.

What's Changed

• chore(deps): update go toolchain directive to v1.27.4 [security] by @renovate in #243. Fixes CVE-2026-97054 / GO-2026-6859.
• fix(ui): Resolve undici 7.30.1 in the provider plugin in #240

Full Changelog: v0.8.4...v0.8.5