ci: inherit native per-arch runners from reusable publish workflow

[RedStar071]

Cosa cambia

Rimuove l'override platforms (e il flag enablePlatforms, ormai non più usato dal reusable workflow) dalla chiamata a reusable-publish-image.yml: il workflow eredita così i runner di default, ora nativi per architettura (Blacksmith amd64/arm64 — vedi wolfstar-project/.github#35).

Perché

Con l'override attuale entrambe le piattaforme vengono buildate su ubuntu-latest (amd64): la build arm64 passa per l'emulazione QEMU (lenta) e le action useblacksmith/* vanno in fallback sul builder locale. Con i runner nativi ogni architettura è compilata su hardware nativo, come da guida Docker multi-platform.

La modifica è sicura in qualunque ordine di merge rispetto a wolfstar-project/.github#35: anche i vecchi default funzionano senza override.

https://claude.ai/code/session_01Xv1EAagQkhuCRGY584Kuua

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T-Rex Logs

What T-Rex did

• Captured the Before artifact showing initial enablePlatforms: true for both workflows.
• Copied or prepared the validation script at trex-artifacts/validate_workflow_contract.py to verify the workflow contract.
• Captured the After artifact showing has_enablePlatforms: False and has_platforms: False for both workflows, and publish-stable retaining stable_has_commitHash: True and stable_tag_value: "stable".

_{Ran code and verified through T-Rex}

Sequence Diagram

%%{init: {'theme': 'neutral'}}%%
sequenceDiagram
participant Trigger as GitHub trigger
participant Caller as wolfstar workflow
participant Reusable as reusable-publish-image.yml
participant Runner as Default per-arch runner
participant GHCR as GHCR

Trigger->>Caller: push/workflow_dispatch
Caller->>Reusable: uses workflow with inherited secrets
Note over Caller,Reusable: No caller-level platforms override
Reusable->>Runner: select default platform runners
Runner->>Reusable: build image for configured architectures
Reusable->>GHCR: publish image tag

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sequenceDiagram
participant Trigger as GitHub trigger
participant Caller as wolfstar workflow
participant Reusable as reusable-publish-image.yml
participant Runner as Default per-arch runner
participant GHCR as GHCR

Trigger->>Caller: push/workflow_dispatch
Caller->>Reusable: uses workflow with inherited secrets
Note over Caller,Reusable: No caller-level platforms override
Reusable->>Runner: select default platform runners
Runner->>Reusable: build image for configured architectures
Reusable->>GHCR: publish image tag

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