feat: port noir-contracts pinning support from v4

[AztecBot]

Summary

Ports the protocol contracts pinning mechanism from v4 to next, so we have the ability to pin the exact same things as v4.

What was already on next: Protocol circuits + mock circuits pinning (both extraction and pin-build).

What was missing: Noir contracts pinning — the ability to commit a pinned-protocol-contracts.tar.gz that skips recompilation of protocol contracts and SponsoredFPC during builds.

Changes

• noir-projects/noir-contracts/bootstrap.sh:
  • Added pinned-protocol-contracts.tar.gz extraction in build() — skips protocol/* and fees/sponsored_fpc_contract when archive present
  • Added pin-build function and command — builds protocol + fees contracts and bundles into tarball
  • Simplified compile() contract name extraction (bash parameter expansion instead of grep)
  • Simplified parallel piping in compile() (direct pipe instead of temp files)

Usage

cd noir-projects/noir-contracts && ./bootstrap.sh pin-build
git add pinned-protocol-contracts.tar.gz && git commit

Full analysis: https://gist.github.com/AztecBot/d32f0cf97649f4268152cfbe2c43410e

ClaudeBox log: https://claudebox.work/s/c3083833abe42243?run=1