get_source_code function consistently returns 404 errors

[johnkferguson]

The get_source_code function appears to be completely broken, returning 404 errors for all tested paths and crates.

Steps to Reproduce

Multiple attempts with different valid paths:

1. Dioxus example:

{
  "crateName": "dioxus",
  "version": "0.7.0-alpha.1", 
  "path": "prelude/fn.use_signal.html"
}

2. Serde example:

{
  "crateName": "serde",
  "version": "1.0.219",
  "path": "ser/mod.rs"
}

Expected Behavior

Should return source code content for valid paths.

Actual Behavior

All attempts return: Error getting source code: Failed to get source code: HTTP error\! status: 404

Additional Context

• get_type_info provides sourceUrl links that appear valid
• Other functions work correctly for the same crates/versions
• Issue affects both stable and alpha releases