ci: bump pinned pto-isa to e8f558d5

[chenshengxin2026]

Summary

• Advance pto_isa.pin from 83d01313 (2026-07-01) to e8f558d5 (2026-08-03).
• The target is a 278-commit fast-forward.
• The range includes instruction and architecture support, CPU/simulator fixes, and documentation and build maintenance.

Validation

• Confirmed 83d01313 is an ancestor of e8f558d5.
• Verified the pin is one 40-character hexadecimal SHA with a trailing newline.
• git diff --check passes; code tests are not applicable to this pin-only change.

Downstream

PyPTO derives PTO-ISA from this pin through its runtime/ submodule and will pick it up on the next runtime bump. PyPTO-Lib then inherits the pin from PyPTO. This PR does not move either downstream runtime pointer.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 830d25e5-385f-47fc-9041-4ebb01d7af90

📥 Commits

Reviewing files that changed from the base of the PR and between 71433ca and a649f2c.

📒 Files selected for processing (1)

• pto_isa.pin

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📝 Walkthrough

Walkthrough

The pull request updates the pinned PTO-ISA commit revision in pto_isa.pin. It does not alter exported or public declarations.

Changes

PTO-ISA revision

Layer / File(s)	Summary
Update PTO-ISA revision pto_isa.pin	The pinned commit hash changes from 83d01313d9bfc247c4b7c8bcf969d1019f0d106f to e8f558d5dd3b6427033cec3641c4576b771241f3.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• hw-native-sys/simpler#1196: Changes how the PTO-ISA pin is read and used.
• hw-native-sys/simpler#1218: Establishes pto_isa.pin as the single source for PTO-ISA resolution.
• hw-native-sys/simpler#1644: Updates the same PTO-ISA pin.

Poem

A rabbit checks the revision line,
One fresh commit now marks the sign.
The PTO-ISA pin hops bright,
From old hash code to newer byte.
“All set!” says Bun, and bounds from sight.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the pinned pto-isa revision update.
Description check	✅ Passed	The description accurately explains the pin update, validation, scope, and downstream impact.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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