Complete native codegen milestone gate (#50)

.gitea/workflows/codegen.yml

@@ -16,10 +16,17 @@ jobs:
         run: cargo test -p libremetaverse-codegen
       - name: Verify vendored hashes and checked-in output
         run: cargo run -p libremetaverse-codegen -- check
+      - name: Verify authoritative API mappings and consumer fixture
+        run: |
+          python3 tools/generate_rust_mapping.py --check
+          python3 tools/generate_api_shims.py --check
+          python3 tools/check_api_coverage.py
+          cargo check --manifest-path tests/api-compile/Cargo.toml --locked
       - name: Test generated wire codecs and translated parity cases
         run: |
           cargo test -p libremetaverse --lib generated_codec_tests
           cargo test -p libremetaverse --test packet_wire
+          cargo test -p libremetaverse --test packet_osd
           cargo test -p libremetaverse-compat-tests --test wire_semantics
       - name: Test generated visual and foliage catalogs
         run: |
@@ -31,11 +38,10 @@ jobs:
           cargo test -p libremetaverse --lib linden_skeleton
           cargo test -p libremetaverse --lib joint_base_support_category
           cargo test -p libremetaverse --lib joint_get_aliases_list
-      - name: Regenerate twice without reference checkout access
+      - name: Build and audit clean Rust-only release artifacts
         run: |
-          cargo run -p libremetaverse-codegen -- generate
-          cargo run -p libremetaverse-codegen -- generate
-          git diff --exit-code -- codegen/generated crates/libremetaverse/src/packet_catalog.rs crates/libremetaverse/src/visual_catalog.rs crates/libremetaverse/src/foliage_catalog.rs crates/libremetaverse/src/skeleton_catalog.rs crates/libremetaverse/src/attention_catalog.rs crates/libremetaverse/src/genepool_catalog.rs
+          cargo build --workspace --release --locked
+          python3 tools/check_codegen_gate.py --release-dir target/release
       - name: Lint native generator
         run: |
           cargo clippy -p libremetaverse-codegen --all-targets -- -D warnings