axon-frontend 0.19.0

AXON compiler frontend — lexer, parser, AST, epistemic type system, type checker, IR generator. Zero runtime dependencies. v0.19.0 adds the Declared & Compile-Time-Typed Store Schema — an `axonstore` may declare its columns inline, by manifest reference, or per-tenant via env-var; `axon check` proves every `where:`, `persist`, `mutate`, `purge` against declared columns with 6 error codes (T801–T805 + T807) plus Levenshtein-suggested names + type-compatible alternatives (Fase 38). v0.18.0 adds the Request Binding Contract totality check — an axonendpoint's `execute:` flow parameters must be covered by its `body:` type at compile time (Fase 37). v0.17.0 adds `in_memory` to the axonstore backend catalog (Fase 36.x). v0.12.0 ships the wire-format adapter cycle. v0.11.0 Fase 32 REST routes. v0.10.0 Fase 31 type-driven wire. v0.9.0 Fase 30 HTTP. v0.2.0–v0.8.0 earlier compiler cycles.
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//! §Fase 11.e — OTS (Ontological Tool Synthesis) compile-time slug catalogs.
//!
//! These constants are consumed by `type_checker` to validate that
//! `ots:transform:*` and `ots:backend:*` effect slugs carry only
//! qualifiers from the closed catalog. The runtime side of OTS —
//! pipeline execution, transformer registry, native transcoders,
//! ffmpeg subprocess fallback — lives in the `axon` runtime crate
//! at `axon_rs::ots` and re-exports these constants for backward
//! compatibility.
//!
//! Keeping the catalog here (not in the runtime) means any tool that
//! analyses AXON source (LSP, linters, analyzers) can validate OTS
//! usage without linking the full runtime.

/// Effect slug `ots:transform:<from>:<to>` declares a tool as
/// performing a kind conversion. The checker verifies a path exists.
pub const OTS_TRANSFORM_EFFECT_SLUG: &str = "ots:transform";

/// Effect slug `ots:backend:<kind>` declares HOW the conversion
/// happens. Closed qualifier set — new backends require a patch.
pub const OTS_BACKEND_EFFECT_SLUG: &str = "ots:backend";

/// Catalogue of valid `ots:backend:<qualifier>` qualifiers.
pub const OTS_BACKEND_CATALOG: &[&str] = &["native", "ffmpeg"];