Improve error messages and unify URL/path resolution

- Add file path to error messages in util.rs for better debugging
- Add TextFile::resolve() for consistent URL vs local path handling
- Fix bug where URLs were incorrectly joined with local directories

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: ryo33

Cargo.lock

@@ -44,7 +44,7 @@ tracing-subscriber = "0.3"
 query-flow = "0.12"
 glob = "0.3"
 url = "2"
-reqwest = { version = "0.13", default-features = false, features = ["blocking"] }
+reqwest = { version = "0.13", features = ["blocking"] }
 
 # For faster parser generation
 [profile.dev.package.parol]

Cargo.toml

@@ -90,10 +90,16 @@ where
                     if let Some(file) = pending.key::<TextFile>() {
                         match file {
                             TextFile::Local(path) => {
-                                let content = TextFileContent(fs::read_to_string(path.as_ref())?);
+                                let path_ref = path.as_ref();
+                                let content = fs::read_to_string(path_ref).map_err(|e| {
+                                    std::io::Error::new(
+                                        e.kind(),
+                                        format!("{}: {}", path_ref.display(), e),
+                                    )
+                                })?;
                                 runtime.resolve_asset(
                                     file.clone(),
-                                    content,
+                                    TextFileContent(content),
                                     DurabilityLevel::Static,
                                 );
                             }