hv1 verify: add direct route (env JSON) and clean inline path; fix v1 phi incoming order; make test_runner use hv1 direct; add phase2037 phi canaries; load modules.workspace exports for alias; update docs (phase-20.38, source extensions) and CURRENT_TASK

src/using/errors.rs

@@ -6,5 +6,10 @@ pub enum UsingError {
     ReadToml(String),
     #[error("invalid nyash.toml format: {0}")]
     ParseToml(String),
+    #[error("failed to read workspace module '{0}': {1}")]
+    ReadWorkspaceModule(String, String),
+    #[error("invalid workspace module '{0}': {1}")]
+    ParseWorkspaceModule(String, String),
+    #[error("workspace module '{0}' is missing module.name")]
+    WorkspaceModuleMissingName(String),
 }
-