fix(docker): pin cryo builder to rust 1.96 - #875
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rust:1-bookworm moved to 1.97.0 between the devnet-6 (2026-07-09, green) and devnet-7 (2026-07-12, red) release runs, invalidating the cryo-buildcache layer and recompiling cryo under a rustc that rejects ethnum 1.5.0's IntErrorKind transmute (E0512). cryo's --locked install pins ethnum, so the toolchain was the only floating input. Pin it to the last-good 1.96 line; revisit alongside the next CRYO_GIT_REF bump. Claude-Session: https://claude.ai/code/session_019cbhUv62kwFTKQD5aM8FGC
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Pins the cryo-builder stage to
rust:1.96-bookworm. The floatingrust:1-bookwormtag moved to 1.97.0 between the 2026-07-09 and 2026-07-12 release runs, invalidating the cryo-buildcache layer and recompiling cryo under a rustc that rejects theIntErrorKindtransmute in ethnum 1.5.0 (error[E0512]), which cryo's--lockedlockfile pins. The pin should move together with the nextCRYO_GIT_REFbump once cryo's lockfile carries an ethnum that builds on current stable.Same commit is on
release/glamsterdam-devnet-7(dfbabda).release/glamsterdam-devnet-6still has the floating tag — its next release tag will hit the same failure unless dfbabda is cherry-picked there (deliberately not pushed, since any push to that branch republishes the rolling image live devnet-6 sentries track).https://claude.ai/code/session_019cbhUv62kwFTKQD5aM8FGC