Migrate url.parse() to WHATWG URL API

[flyingrobots]

Context

src/server/index.js uses url.parse(req.url, true) which triggers [DEP0169] DeprecationWarning in Node.js. This shows up in every test run.

Proposal

Replace url.parse() with the WHATWG new URL() API. Extract pathname and query using URL and URLSearchParams.

References

• src/server/index.js L118
• Node.js DEP0169: https://nodejs.org/api/deprecations.html#DEP0169