Parse URLs lazily in resolver (#10259)

## Summary

The idea here is to avoid parsing all registry URLs upfront, and instead
parse them when we need them.

Closes #6133.

crates/uv-distribution/src/distribution_database.rs

@@ -187,7 +187,7 @@ impl<'a, Context: BuildContext> DistributionDatabase<'a, Context> {
                     FileLocation::RelativeUrl(base, url) => {
                         uv_pypi_types::base_url_join_relative(base, url)?
                     }
-                    FileLocation::AbsoluteUrl(url) => url.to_url(),
+                    FileLocation::AbsoluteUrl(url) => url.to_url()?,
                 };
 
                 // Create a cache entry for the wheel.

crates/uv-distribution/src/error.rs

@@ -21,11 +21,11 @@ pub enum Error {
     NoBuild,
 
     // Network error
-    #[error("Failed to parse URL: {0}")]
-    Url(String, #[source] url::ParseError),
     #[error("Expected an absolute path, but received: {}", _0.user_display())]
     RelativePath(PathBuf),
     #[error(transparent)]
+    InvalidUrl(#[from] uv_distribution_types::ToUrlError),
+    #[error(transparent)]
     ParsedUrl(#[from] ParsedUrlError),
     #[error(transparent)]
     JoinRelativeUrl(#[from] uv_pypi_types::JoinRelativeError),

crates/uv-distribution/src/source/mod.rs

@@ -114,7 +114,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                     FileLocation::RelativeUrl(base, url) => {
                         uv_pypi_types::base_url_join_relative(base, url)?
                     }
-                    FileLocation::AbsoluteUrl(url) => url.to_url(),
+                    FileLocation::AbsoluteUrl(url) => url.to_url()?,
                 };
 
                 // If the URL is a file URL, use the local path directly.
@@ -263,7 +263,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                     FileLocation::RelativeUrl(base, url) => {
                         uv_pypi_types::base_url_join_relative(base, url)?
                     }
-                    FileLocation::AbsoluteUrl(url) => url.to_url(),
+                    FileLocation::AbsoluteUrl(url) => url.to_url()?,
                 };
 
                 // If the URL is a file URL, use the local path directly.