Pin ESP-IDF to v6.1-beta1 (ride the betas toward v6.1 GA)

[ewowi]

What

Moves the pinned ESP-IDF from the rolling release/v6.1 branch commit (v6.1-dev-5215, 2026-06-08) to the tagged v6.1-beta1 pre-release (commit b1d13e9f, 2026-06-24, +168 commits). Both local (setup_esp_idf.py) and CI (the esp-idf-ci-action Docker tag in release.yml) move together, so the two build environments stay identical.

Why

Ride the tagged betas toward v6.1 GA (targeted late July 2026) rather than jumping straight from the dev branch to GA. This surfaces any breakage from the v6.1 delta incrementally — one beta at a time — instead of all at once at the GA re-pin, and swaps a moving branch tag for a fixed, signed pre-release pin.

Verified locally (macOS, against the real beta1 toolchain)

Variant	Result
esp32 (classic)	✅ builds clean, 17% app free — no API breakage across the 168-commit delta
esp32p4-eth-wifi	✅ builds clean, 60% free — esp_hosted + esp_wifi_remote compile + link
esp32p4-eth runtime (P4-NANO)	✅ boots clean, 139 FPS on Ethernet

P4-WiFi boot crash (esp-idf #18759) — still present on beta1

The P4-WiFi variant was flashed to the P4-NANO on beta1 and still bootloops with the known upstream crash, verbatim:

sleep_clock: sleep_clock_icg_init(142): failed to allocate memory for system sleep clock ICG
cpu_start: init function 0x400f7d74 has failed (0x101), aborting  →  reboot loop

Expected: the beta1 delta's sleep-retention commits are ESP32-S31-specific, and pmu_sleep_clock_icg.c (the crashing file) is unchanged. The CONFIG_PM_ENABLE-gating fix #18759 needs has not landed. So esp32p4-eth-wifi stays held out of the release matrix; only esp32p4-eth ships for the P4. This PR does not change that — it's a build-de-risking pin bump, not a P4-WiFi fix.

What CI validates here

release.yml (triggered by this PR touching .github/workflows/release.yml + moondeck/build/**) builds every ships=True variant against the v6.1-beta1 Docker image — the CI-side confirmation of the local macOS builds above.

Notes

• The eventual v6.1 GA re-pin is a separate deliberate re-test pass (per docs/building.md § ESP-IDF version).
• No src/ changes — this is purely the IDF pin (setup script, CI Docker tag, building.md).

🤖 Generated with Claude Code

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