fix: install Linux package binaries under /usr/bin

[fallintoplace]

Summary

• install packaged Linux binaries under /usr/bin
• keep deb, apk, rpm, and Arch packages on the standard executable path

Why

The nFPM configuration currently uses /usr as its binary directory, so packages place the executable at /usr/openai. That location is not normally on PATH, leaving a successful package installation without a directly runnable openai command.

Test plan

• ran the pinned GoReleaser 2.15.4 snapshot release
• verified the generated deb, apk, and Arch packages contain usr/bin/openai

[markstuart-oai]

@codex review

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-06T01:31:21.638466Z	f4577fb	Manual request
🔒 Security Review	✅ Completed 2026-09-06T01:31:49.870410Z	f4577fb	Manual request

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[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Can't wait for the next one!

Reviewed commit: f4577fb90c

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[chatgpt-codex-connector]

Security review completed. No security issues were found in this pull request.

Reviewed commit: f4577fb90c

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