Sweep utils/python_script.rs

One tool_uv reader replaces three [tool.uv] chains, and one
declares_directly replaces the three "is this a direct dependency"
copies in hosted_override_pins, wires_through_override and the two
metadata rewriters. push_hosted_override is inlined into its one
caller and is_hosted_override is private.

refuse_uv_no_sources / refuse_uv_no_binary lose their script
parameter: every caller passed None (scripts use the *_script_*
variants). The SourcesLayout doc is trimmed to its why, bare issue
numbers are gone, and a unit test now covers no-binary's combine rules.

Assisted-by: Claude Code:claude-opus-5-5

Author: claude

crates/socket-patch-core/src/patch/redirect/mod.rs

@@ -6492,14 +6492,12 @@ fn plan_python_metadata_with(
     } else {
         crate::utils::python_script::refuse_uv_no_sources(
             &dep.name,
-            None,
             Some(&original),
             project_file(crate::utils::python_script::UV_TOML),
         )
         .and_then(|()| {
             crate::utils::python_script::refuse_uv_no_binary(
                 &dep.name,
-                None,
                 Some(&original),
                 project_file(crate::utils::python_script::UV_TOML),
             )