Improvement: proxy-sovd - Forward parsed request data to SOVD gateway for write requests needing request-parameter context

[arvindr19]

Description

Currently its mocked response is generated. Once SOVD server is available, forward parsed request data to SOVD server for writes.
Write requests (0x2E) decode the UDS payload via MDD into structured parameter values, but those values are not currently forwarded to the SOVD gateway - the PUT body is sent without request-parameter context.

• Pass decoded write parameters into the SOVD PUT request body

Additional Context

File: proxy-sovd/src/mapper.rs
PR: #12