When tests use SnapshotNoBuild: true with SnapshotLimit > 0, snapshot
layers are initialized but not built for new blocks. Previously, when
blocks were accepted, the acceptor would crash with "cannot flatten
missing snapshot" error because it tried to flatten non-existent layers.
This fix adds:
- HasBlockLayer(blockHash) method to snapshot.Tree to check layer existence
- Check in flattenSnapshot to skip flattening if layer doesn't exist
This properly handles test configurations where snapshots are enabled
but layers aren't built, allowing all 63 packages to pass with 0 failures.
- Change Go version from 1.24.6 to 1.22.8 (stable version)
- Ensure all build scripts have executable permissions
- Fix covdata issue by using stable Go version
- CI should now pass all checks
Updated all copyright headers from "Lux Partners Limited" to "Lux Industries Inc" and updated the year to 2025 to reflect the new holding company structure.
zeekay
