Function dispatch_binding 

pub async fn dispatch_binding(
    state: &AppState,
    namespace_path: &str,
    procedure_name: &str,
    params: Params,
    identity: IdentityId,
    metadata: RequestMetadata,
) -> Result<(Vec<Frame>, ExecutionMetrics), ExecuteError>

Synthesize and dispatch CALL {ns}::{proc}() for a binding; parameters are resolved at execution time from params (no $name placeholders in the CALL text).

The caller is responsible for:

• Resolving the binding and locating its procedure by binding.procedure_id.
• Validating params against the procedure’s declared parameter list (rejecting unknown keys, missing required, type-coercion failures) before calling here.
• Building RequestMetadata from its transport-specific request.

Returns (frames, metrics) from the engine; each transport wraps it into its own response format based on binding.format and reads metrics.total / metrics.fingerprint for telemetry headers.