axon-frontend 0.19.1

AXON compiler frontend — lexer, parser, AST, epistemic type system, type checker, IR generator. Zero runtime dependencies. v0.19.1 adds IDENTITY column recognition — `GENERATED ALWAYS/BY DEFAULT AS IDENTITY` columns parsed via `pg_attribute.attidentity`; T803 NOT-NULL-omission proof skips identity columns since Postgres auto-fills them (Fase 38.x.c). v0.19.0 adds the Declared & Compile-Time-Typed Store Schema — `axonstore` declares columns inline/by-manifest/per-tenant; `axon check` proves every where/persist/mutate/purge with 6 error codes (T801–T805 + T807) plus Levenshtein suggestions (Fase 38). v0.18.0 the Request Binding Contract totality check (Fase 37). v0.17.0 `in_memory` axonstore backend (Fase 36.x). v0.12.0 wire-format adapter. v0.11.0 Fase 32 REST. v0.10.0 type-driven wire. v0.9.0 HTTP. v0.2.0–v0.8.0 earlier cycles.