fix: align localnet chain id with Studio

[MuncleUscles]

Summary

• set the published Python localnet preset to Studio’s canonical local chain ID 61127
• retain hosted Studio IDs 61997/61999 and classify all three presets as Studio chains
• make every Studio preset ID distinct
• keep uv.lock synchronized by the release command and reject stale lock metadata in native CI

Root cause and impact

Python retained its initial localnet=61999 constant after Studio and genlayer-js moved local Studio to 61127. Contract deploy/write/appeal/top-up/finalize operations sign with the preset ID, so a normal Python client could submit a raw transaction Studio rejects as InvalidChainId.

The cross-repository E2E did not catch this because its harness sets a runtime chain ID and mutates both SDK presets to match it. These new unit tests exercise the shipped preset and the exact transaction passed to the signer instead.

Validation

• uv lock --check
• focused chain + signer suite: 65 passed
• full Python 3.12 unit suite: 224 passed, 17 deselected
• git diff --check

Release

RC1 is immutable; after this lands the v0.19 development branch should cut 0.19.0-rc.2. The testing-suite RC and Boilerplate release must require rc2, not rc1.

Paired follow-up: update Studio’s stale .env.example local ID and add a bootstrap-consistency regression.

[coderabbitai]

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