fix(core): clamp uuidv7 RNG output to a valid uint32 so a nonconformant Math.random cannot crash event capture (#4616)

* fix(core): clamp uuidv7 RNG output to a valid uint32

A nonconformant Math.random() that returns >= 1 or NaN (e.g. Hermes on
Android, whose Math.random is built on C++ std::uniform_real_distribution
— documented to occasionally return its upper bound) pushes the uuidv7
random fields out of range, making fromFieldsV7 throw
'RangeError: invalid field value' on every capture and crash-looping RN
apps during the internal event-queue flush. Clamp nextUint32() with
'>>> 0' so a bad random value degrades entropy for that id instead of
throwing; timestamp bits untouched, ids remain spec-valid UUIDv7.

* chore(changeset): include posthog-react-native

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Co-authored-by: Shahid R <shahid.rogers@paywatchglobal.com>
Co-authored-by: Manoel Aranda Neto <marandaneto@gmail.com>