fix: add json parse error handler

[7eliassen]

Adds explicit handling for JSON parsing errors in the global error handler. When a request contains invalid JSON, the server now returns a consistent 400 Bad Request response instead of falling through to generic error handling.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	85.82% (🎯 80%) ⬇️ -0.09%	8938 / 10414
🔵	Statements	85.82% (🎯 80%) ⬇️ -0.09%	8938 / 10414
🔵	Functions	79.53% (🎯 80%) 🟰 ±0%	276 / 347
🔵	Branches	84.28% (🎯 80%) ⬇️ -0.29%	445 / 528

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/presentation/http/http-api.ts	93.45% ⬇️ -2.61%	85.29% ⬇️ -5.03%	93.75% 🟰 ±0%	93.45% ⬇️ -2.61%	103-111, 122-123, 325-326, 349-350, 380-390

Generated in workflow #912 for commit f322e19 by the Vitest Coverage Report Action