Fix schema-guided tool parameter coercion (#1143)

* Fix schema-guided tool parameter coercion

* Fix CI checks for coercion regression tests

* Finish panic-scan annotations

* Avoid redundant worker param preparation

* Keep panic-scan annotations rustfmt-stable

* Handle nullable WASM schema review feedback

* Address param coercion review notes

src/tools/mod.rs

@@ -9,6 +9,7 @@
 
 pub mod builder;
 pub mod builtin;
+mod coercion;
 pub mod execute;
 pub mod mcp;
 pub mod rate_limiter;
@@ -24,6 +25,7 @@ pub use builder::{
     LlmSoftwareBuilder, SoftwareBuilder, SoftwareType, Template, TemplateEngine, TemplateType,
     TestCase, TestHarness, TestResult, TestSuite, ValidationError, ValidationResult, WasmValidator,
 };
+pub(crate) use coercion::prepare_tool_params;
 pub use rate_limiter::RateLimiter;
 pub use registry::ToolRegistry;
 pub use tool::{