v2.15.0

What's Changed

• fix(window): scope instance mutex to local session by @CodeZeno in #116
• fix(poller): respect Retry-After cooldowns across providers by @CodeZeno in #117
• fix(build): pin Rust toolchain to 1.95.0 by @CodeZeno in #118
• chore(security): add dependency scanning and update automation by @CodeZeno in #119
• fix(license): update copyright holder by @CodeZeno in #120
• docs: add community and security guidelines by @CodeZeno in #121
• Unify studio helpers into the Builder by @CodeZeno in #122
• fix(build): statically link the Windows MSVC runtime by @CodeZeno in #123
• test(windows): add Hyper-V VM test harness by @CodeZeno in #124

Full Changelog: v2.14.55...v2.15.0