Upgrade utopia-php/fetch from 0.4 to 0.5

[ChiragAgg5k]

Summary

• Upgrades utopia-php/fetch from 0.4.2 to 0.5.1
• Fixes breaking change: timeout units changed from seconds to milliseconds in 0.5
  • Updated setTimeout(60) → setTimeout(60000) in test client

Breaking changes in fetch 0.5

• Timeout units: setTimeout() and setConnectTimeout() now use milliseconds instead of seconds
• $body parameter: fetch() now accepts array|string|null (was ?array) — backward compatible
• New optional params: $timeoutMs and $connectTimeoutMs added to fetch() for per-request overrides
• PHP requirement: Bumped from 8.0 to 8.1

Test plan

• Verify e2e tests pass with updated timeout value
• Confirm no other usages of fetch library setTimeout/setConnectTimeout exist in codebase