Four validation branches with community changes are now on main :)

[Glen-SP]

In #191 we described how contributions move through validation branches before reaching main.

The first full cycle is now complete:
Four validation branches passed CI and real-task testing, have been merged, and the branches have been removed.

Merged	What it fixes	PR
macos-runtime-portability	Process identity and guards now behave correctly on macOS	#197
run-lifecycle-integrity	start / status / stop / resume behave correctly, including daemonized runs	#198
budget-and-cost-accounting	Token grants are actually enforced, and run cost is recorded	#199
model-provider-expansion	Adds Cloudflare Workers AI, Groq, Mistral, OrcaRouter and xAI providers	#200

This closes #81, #82 and #85.

Thank you to everyone whose work is in this release:
@AnandkumarMall, @Ar1es-XD, @IgorDaniel45, @MASTER870-CMD, @mikeumus, @warun7,
@electrixoul, @lovejones2914-spec and @rohanprichard.

Every one of you is recorded as a co-author on the commit your work landed in, as
we promised when we closed your PRs.

We're continuing on a roughly weekly cycle, and the next batch of validation
branches is already in progress. Issues and PRs are very welcome.

🔗 How contributions are handled after submission:
https://github.com/sapientinc/PRAXIST?tab=contributing-ov-file#what-happens-after-submission

Have feedback, questions, or ideas for PRAXIST? Join our Discord to talk with the
team and other builders: https://discord.gg/dX8WSFHnvj