feat(embed): EmbeddingGemma 2 load and apr embed on GGUF (APR-EMBED-001 EG-0..EG-2)

README.md

@@ -114,7 +114,7 @@ publishing — all backed by YAML provable contracts that fail CI on drift.
 | Metric | Count | Source of truth |
 |-------:|------:|---|
 | Workspace crates | **81** workspace crates | `cargo metadata --no-deps` (NOT `ls crates/` — 4 are `exclude`d, 1 has no Cargo.toml) |
-| Provable contracts | **<!-- CONTRACT_COUNT_START -->1903<!-- CONTRACT_COUNT_END -->** provable contracts | `contracts/census.json` `.n_files` — the set `pv lint` walks (`pv census`, ONT-001 ONT-1; regenerated by `make contracts`, written by `make readme-sync`, guarded by `scripts/check_readme_claims.sh`) |
+| Provable contracts | **<!-- CONTRACT_COUNT_START -->1905<!-- CONTRACT_COUNT_END -->** provable contracts | `contracts/census.json` `.n_files` — the set `pv lint` walks (`pv census`, ONT-001 ONT-1; regenerated by `make contracts`, written by `make readme-sync`, guarded by `scripts/check_readme_claims.sh`) |
 | CLI commands | **113** CLI commands | `contracts/apr-cli-commands-v1.yaml` §`commands` (parse the list; `apr --help` also lists `help` itself, and `grep -c '^  - name:'` gives 119 — other same-indent `name:` keys exist in the file) |
 | Book CLI chapters | **114** chapters | `ls book/src/cli/*.md` |
 | Book lib chapters | **73** chapters | `ls book/src/lib/*.md` (parity with `pub mod`) |
@@ -403,7 +403,7 @@ falsification_tests:
   prediction: apr validate bad-model.apr exits non-zero
 ```
 
-The tree carries <!-- CONTRACT_COUNT_START -->1903<!-- CONTRACT_COUNT_END --> contracts across inference, training, quantization, attention, FFN,
+The tree carries <!-- CONTRACT_COUNT_START -->1905<!-- CONTRACT_COUNT_END --> contracts across inference, training, quantization, attention, FFN,
 tokenization, model formats, CLI safety — and this README itself.
 
 ## Migration from old crates

book/src/cli/embed.md

@@ -2,7 +2,7 @@
 
 # apr embed
 
-Produce sentence embeddings from a BERT bi-encoder (GH-326 Phase 6).
+Produce sentence embeddings from a BERT APR file (GH-326 Phase 6) or an EmbeddingGemma 2 GGUF file (APR-EMBED-001).
 
 **Category**: Other