feat(livewire): capture component state from snapshot data

[Naoray]

Summary

• Extracts component state (data key) from Livewire snapshot payloads in LivewireDataCollector::extractComponents()
• Adds truncateState() method that caps state at 50 keys and 8KB serialized size to prevent excessive data capture
• Sensitive values in state are automatically redacted by the existing redactPayload() call
• Adds 7 new tests covering state extraction, truncation by key count, truncation by size, redaction of sensitive state values, and edge cases

Closes #36

Test plan

• Existing 7 LivewireDataCollector tests still pass
• New test: component state is captured from JSON-encoded snapshot
• New test: component state is captured from array snapshot
• New test: state key is absent when snapshot has no data
• New test: state is truncated when exceeding 50 keys
• New test: state is truncated when serialized size exceeds 8KB
• New test: sensitive values (password) in state are redacted
• Full test suite passes (285 tests, 877 assertions)

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