ADR: Tokens Studio platform pipeline adoption

[pomfrida]

Write an ADR documenting the overarching decision behind the Tokens Studio pipeline (#5108, PRs #5151, #5153, #5155, #5160, #5166, #5175, #5176): the platform as source of truth, the release-triggered repository_dispatch chain, OIDC auth without stored secrets, platform exports landing as PRs, and the hourly orphan-branch backup (#5154) compensating for the platform's lack of undo.

ADR-0008 documents the TS codegen slice; this ADR is the anchor it builds on.

Related: #5108, #5154, #5169

[claude]

These issues look closely related to this ADR and may be worth reviewing for context:

• Establish a new Token build & publishing pipeline #5108 — Establish a new Token build & publishing pipeline (closed, completed): the umbrella issue that built the pipeline this ADR documents.
• Automated git backup of Tokens Studio tokens via studio CLI #5154 — Automated git backup of Tokens Studio tokens via studio CLI (closed, completed): the hourly orphan-branch backup this ADR describes as compensating for the platform's lack of undo.
• ADR: TypeScript token generation from Tokens Studio exports #5169 — ADR: TypeScript token generation from Tokens Studio exports (closed, completed): the codegen-slice ADR (ADR-0008) that this overarching ADR is meant to anchor.
• Document the new Tokens Studio pipeline #5168 — Document the new Tokens Studio pipeline (closed, completed): documentation of the same pipeline, useful source material for the ADR.

This comment was generated by an LLM and may be inaccurate. Please verify that the linked issues are actually relevant.