feat(signals): Ignore events before replay session starts / after ends + 5s

[sortafreel]

Problem

• Some events are recorded before we have a Replay session, so they aren't visible in the player/recording
• Events at the very start of the session are usually render-related and spammy, so don't mean much
• Events at the very end aren't verifiable, as we can't render a video either

Changes

• If the event tracked before Replay session started recording, after the session end, or 5s threshold - filter it out before sending to LLM

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Changelog: (features only) Is this feature complete?

[greptile-apps]

_{9 files reviewed, 2 comments}

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[Twixes]

Lookin good, no notes