feat(http): separate request path and query string for endpoint routing

[GreyPikachu]

Description

This pull request extracts the request URL path and query string separately in HttpRequest and routes endpoints based on the path.

Motivation

Previously, Reactor::Route compared request.target directly against route literals (e.g. request.target == "/processes"). If an HTTP client appended a query string (such as curl http://localhost:8080/processes?filter=worker), the server failed with a 404 not_found because the query parameters were part of target. Separating path and query enables URL query parameters on all HTTP endpoints without route mismatches.

Changes

• server/http: Added path and query fields to HttpRequest and split target at ?.
• server/transport: Updated Reactor::Route to match against request.path.
• tests/core: Added test case in TestHttp validating query string separation.

Verification

• Verified with unit tests in TestHttp: query strings like GET /processes?filter=web now resolve to 200 with parsed path and query.