refactor: move validation middleware rust crate under crates

Signed-off-by: lucarlig <luca.carlig@ibm.com>

Author: lucarlig

Makefile

@@ -8534,11 +8534,11 @@ rust-check: rust-build-check rust-fmt-check rust-lint rust-test  ## Run all Rust
 rust-validation-install: rust-ensure-deps  ## Build and install the Rust validation extension into the active venv
 	@test -d "$(VENV_DIR)" || $(MAKE) venv
 	@echo "🧪 Installing Rust validation extension..."
-	@/bin/bash -c "source $(VENV_DIR)/bin/activate && maturin develop --manifest-path tools_rust/validation_middleware_rust/Cargo.toml"
+	@/bin/bash -c "source $(VENV_DIR)/bin/activate && maturin develop --manifest-path crates/validation_middleware_rust/Cargo.toml"
 
 rust-validation-test: rust-ensure-deps  ## Run tests for the Rust validation extension crate
 	@echo "🧪 Testing Rust validation extension..."
-	@cargo test --manifest-path tools_rust/validation_middleware_rust/Cargo.toml
+	@cargo test --manifest-path crates/validation_middleware_rust/Cargo.toml
 
 rust-doc: rust-ensure-deps              ## Build Rust documentation
 	@echo "🦀 Building Rust documentation..."

…st/validation_middleware_rust/Cargo.lock …es/validation_middleware_rust/Cargo.locktools_rust/validation_middleware_rust/Cargo.lock renamed to crates/validation_middleware_rust/Cargo.lock tools_rust/validation_middleware_rust/Cargo.lock renamed to crates/validation_middleware_rust/Cargo.lock

@@ -29,7 +29,7 @@
 from mcpgateway.middleware.validation_middleware import ValidationMiddleware
 
 REPO_ROOT = Path(__file__).resolve().parents[2]
-RUST_VALIDATION_MANIFEST = REPO_ROOT / "tools_rust" / "validation_middleware_rust" / "Cargo.toml"
+RUST_VALIDATION_MANIFEST = REPO_ROOT / "crates" / "validation_middleware_rust" / "Cargo.toml"
 UDS_TARGET_MEDIANS_MS = {
     "nested_safe": 0.153,
     "deep_nested": 0.806,

…st/validation_middleware_rust/Cargo.toml …es/validation_middleware_rust/Cargo.tomltools_rust/validation_middleware_rust/Cargo.toml renamed to crates/validation_middleware_rust/Cargo.toml tools_rust/validation_middleware_rust/Cargo.toml renamed to crates/validation_middleware_rust/Cargo.toml

@@ -1,7 +1,7 @@
 from pathlib import Path
 
 ROOT = Path(__file__).resolve().parents[2]
-STUB_PATH = ROOT / "tools_rust" / "validation_middleware_rust" / "python" / "validation_middleware_rust" / "__init__.pyi"
+STUB_PATH = ROOT / "crates" / "validation_middleware_rust" / "python" / "validation_middleware_rust" / "__init__.pyi"
 
 
 def test_validation_middleware_rust_generates_packaged_stub():