feat(rrweb): add screenshot strategy serialization

[markushi]

Summary

• Add screenshot strategy serialization to RRWeb options events
• Maps PIXEL_COPY screenshot strategy to "pixelCopy" and defaults to "canvas"
• Updates test fixture to include the new field

Test plan

• Updated test JSON fixture with expected screenshot strategy value
• Verify serialization logic correctly handles both strategy types

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against aa2cf20

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	316.02 ms	365.30 ms	49.28 ms
Size	1.58 MiB	2.12 MiB	551.55 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
27d7cf8	397.90 ms	498.65 ms	100.75 ms
9fbb112	361.43 ms	427.57 ms	66.14 ms
b3d8889	371.33 ms	426.24 ms	54.92 ms
b3d8889	420.46 ms	453.71 ms	33.26 ms
d217708	355.34 ms	381.39 ms	26.05 ms
27d7cf8	314.17 ms	347.00 ms	32.83 ms
ee747ae	396.82 ms	441.67 ms	44.86 ms
3d205d0	352.15 ms	432.53 ms	80.38 ms
85d7417	347.21 ms	394.35 ms	47.15 ms
d5a29b6	298.62 ms	391.78 ms	93.16 ms

App size

Revision	Plain	With Sentry	Diff
27d7cf8	1.58 MiB	2.12 MiB	549.42 KiB
9fbb112	1.58 MiB	2.11 MiB	539.18 KiB
b3d8889	1.58 MiB	2.10 MiB	535.07 KiB
b3d8889	1.58 MiB	2.10 MiB	535.07 KiB
d217708	1.58 MiB	2.10 MiB	532.97 KiB
27d7cf8	1.58 MiB	2.12 MiB	549.42 KiB
ee747ae	1.58 MiB	2.10 MiB	530.95 KiB
3d205d0	1.58 MiB	2.10 MiB	532.97 KiB
85d7417	1.58 MiB	2.10 MiB	533.44 KiB
d5a29b6	1.58 MiB	2.12 MiB	549.37 KiB

Previous results on branch: feat/rrweb-screenshot-strategy

Startup times

Revision	Plain	With Sentry	Diff
88722ce	308.94 ms	355.16 ms	46.23 ms
4bd0606	310.92 ms	346.12 ms	35.21 ms

App size

Revision	Plain	With Sentry	Diff
88722ce	1.58 MiB	2.12 MiB	551.56 KiB
4bd0606	1.58 MiB	2.12 MiB	551.55 KiB