Retrofit loses modified request headers when wrapping okhttp3.Response to retrofit2.Response

When an OkHttp interceptor modifies request headers, the modified headers are present in okhttp3.Response.request but are not preserved in retrofit2.Response.raw().request.

Steps to Reproduce:

1. Create an interceptor that modifies request headers: updatedReq = originalReq.newBuilder().addHeader("X-Custom-Header", "some-value").build() httpResponse = chain.proceed(updatedReq)
2. okhttp3.Response.request has the header ✅
3. retrofit2.Response.raw().request.header("X-Custom-Header") returns null ❌

Expected Behavior: retrofit2.Response.raw().request should contain the same headers as okhttp3.Response.request (the modified request that was actually sent).

Actual Behavior: retrofit2.Response.raw().request contains the original request headers (before interceptor modifications).

Impact: Custom headers added by interceptors cannot be extracted from retrofit2.Response.raw().request, forcing workarounds like adding values to response headers.