Implement Lustre/SCADE Fly-By-Wire Signatures

[squid-protocol]

Epic: #75
Target: gitgalaxy/standards/language_standards.py

Context & Strategic Value

Modern Airbus aircraft (A320, A380) utilize full-authority fly-by-wire controls. The code for these flight computers is not written manually; Airbus uses SCADE (based on the Lustre declarative language) to formally specify functional requirements, which then auto-generates DO-178C certified C code.

By mapping Lustre/SCADE directly, GitGalaxy can audit the synchronous dataflow specifications before they are translated into C, catching architectural anomalies at the source.

Implementation Tasks

• Add lustre to LANGUAGE_DEFINITIONS.
• Define Extensions: .lus.
• Set lexical_family to hybrid_dash (-- for line comments, /* */ for blocks).
• Implement class_start signature: Target the node keyword (the fundamental block of Lustre).
• Implement state_mutation signature: Target pre (accessing previous state in synchronous dataflow) and -> (initialization).
• Implement branch signature: Target if, then, else, with.

Validation

Scan European fly-by-wire or nuclear control system snippets. Ensure that the state_mutation metric correctly spikes when the pre operator accesses historical clock-cycle states.