v0.2.1

Packaging-only refresh for Windows release artifacts.

• Builds now avoid UPX by default to reduce antivirus and PUA false positives.
• opsera.exe and opsera-skill.zip are rebuilt from the same source with Go strip flags only.
• Local Microsoft Defender scan of the rebuilt opsera.exe found no threats.

SHA256:

• opsera.exe: a66f34908ca924714f37f244d3eb40cd4fcd63de7b4b025cce0139db11c4e565
• opsera-skill.zip: 112662e9a0b9c5a5bb63c2ba72ae31f757af02d0d56c7d0cb44ef6f37efb4079