Fix getRequestStartTime for Octane workers

[m0nclous]

Fix defining $this->start via getRequestStartTime() for Laravel Octane workers
#37

Problem

Under Laravel Octane (Swoole/RoadRunner/FrankenPHP), worker processes are persistent and handle multiple requests during their lifetime. The previous implementation relied on $_SERVER['REQUEST_TIME_FLOAT'] and the LARAVEL_START constant, both of which are set once at worker initialization and never updated between requests.

This caused $this->start to always reflect the start time of the first request handled by the worker, making all subsequent server timing measurements incorrect.

Solution

Use request()->server('REQUEST_TIME_FLOAT') instead, which reads from the current request context that Octane properly resets on each request.

The LARAVEL_START constant is still used as a fallback for non-Octane environments where $_SERVER and constants behave as expected.

Changes

• getRequestStartTime() now checks for LARAVEL_OCTANE in the request context to determine the runtime environment
• Replaced $_SERVER superglobal with request()->server() for Octane compatibility

[ulcuber]

Needs $this->app->scoped(ServerTiming...); instead of singletone to prevent $finishedEvents and stopwatches collision

[ulcuber]

Great hack. Much better than hooking Octane's RequestReceived. The most accurate. I cannot find any better place from swoole-server to RequestReceived event that could allow hook into