fix/screenshot masking during changes

[vaind]

• capture screenshots in sequence until they're stable
• improve timestamps
• fix tests & future handling

📜 Description

💡 Motivation and Context

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPii is enabled
• I updated the docs if needed
• All tests passing
• No breaking changes

🔮 Next steps

[github-actions]

🚨 Detected changes in high risk code 🚨

High-risk code has higher potential to break the SDK and may be hard to test. To prevent severe bugs, apply the rollout process for releasing such changes and be extra careful when changing and reviewing these files:

• flutter/lib/src/screenshot/recorder.dart

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- fix/screenshot masking during changes ([#2553](https://github.com/getsentry/sentry-dart/pull/2553))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

Generated by 🚫 dangerJS against 4439231

[codecov]

Codecov Report

Attention: Patch coverage is 95.52239% with 3 lines in your changes missing coverage. Please review.

Project coverage is 92.05%. Comparing base (3a4de05) to head (4439231).

Files with missing lines	Patch %	Lines
flutter/lib/src/screenshot/retrier.dart	89.65%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2553      +/-   ##
==========================================
+ Coverage   87.21%   92.05%   +4.84%     
==========================================
  Files         257       90     -167     
  Lines        8847     3122    -5725     
==========================================
- Hits         7716     2874    -4842     
+ Misses       1131      248     -883     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[github-actions]

iOS Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1253.86 ms	1273.80 ms	19.94 ms
Size	8.42 MiB	9.88 MiB	1.46 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
c732386	1233.20 ms	1252.08 ms	18.88 ms
934f10e	1245.18 ms	1263.77 ms	18.59 ms
dd933d4	1238.73 ms	1252.43 ms	13.70 ms
e3d9076	1203.68 ms	1230.65 ms	26.97 ms
1b0c8a3	1259.30 ms	1282.78 ms	23.48 ms
02661eb	1244.45 ms	1252.37 ms	7.92 ms
1a93825	1257.25 ms	1261.55 ms	4.30 ms
00236a7	1250.06 ms	1274.00 ms	23.94 ms
8a10ab7	1226.49 ms	1250.52 ms	24.03 ms
3f23617	1261.93 ms	1286.10 ms	24.17 ms

App size

Revision	Plain	With Sentry	Diff
c732386	8.28 MiB	9.33 MiB	1.05 MiB
934f10e	8.38 MiB	9.77 MiB	1.39 MiB
dd933d4	8.33 MiB	9.64 MiB	1.31 MiB
e3d9076	8.33 MiB	9.40 MiB	1.07 MiB
1b0c8a3	8.38 MiB	9.75 MiB	1.37 MiB
02661eb	8.42 MiB	9.86 MiB	1.44 MiB
1a93825	8.28 MiB	9.34 MiB	1.05 MiB
00236a7	8.38 MiB	9.77 MiB	1.39 MiB
8a10ab7	8.28 MiB	9.34 MiB	1.06 MiB
3f23617	8.16 MiB	9.17 MiB	1.01 MiB

Previous results on branch: fix/screenshot-masking-during-changes

Startup times

Revision	Plain	With Sentry	Diff
d0c6c01	1238.92 ms	1250.12 ms	11.20 ms
9d4a3f9	1246.96 ms	1257.80 ms	10.84 ms
9bedc01	1238.04 ms	1267.28 ms	29.24 ms

App size

Revision	Plain	With Sentry	Diff
d0c6c01	8.42 MiB	9.88 MiB	1.46 MiB
9d4a3f9	8.42 MiB	9.88 MiB	1.46 MiB
9bedc01	8.42 MiB	9.88 MiB	1.46 MiB

[github-actions]

Android Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	456.56 ms	554.10 ms	97.54 ms
Size	6.46 MiB	7.48 MiB	1.02 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
4b943a1	348.17 ms	437.15 ms	88.98 ms
1596141	300.92 ms	368.94 ms	68.02 ms
afa6e2a	349.73 ms	428.48 ms	78.75 ms
9e7630d	449.43 ms	475.82 ms	26.39 ms
ee0ca56	355.35 ms	421.13 ms	65.78 ms
07cd9e8	427.71 ms	461.23 ms	33.52 ms
2e93bab	515.33 ms	558.79 ms	43.46 ms
9a5040f	490.15 ms	563.98 ms	73.83 ms
f735167	404.38 ms	412.57 ms	8.19 ms
3adbea9	395.16 ms	447.88 ms	52.71 ms

App size

Revision	Plain	With Sentry	Diff
4b943a1	6.34 MiB	7.28 MiB	968.41 KiB
1596141	6.16 MiB	7.14 MiB	1003.98 KiB
afa6e2a	6.27 MiB	7.20 MiB	955.69 KiB
9e7630d	6.49 MiB	7.56 MiB	1.07 MiB
ee0ca56	6.33 MiB	7.30 MiB	992.52 KiB
07cd9e8	6.49 MiB	7.56 MiB	1.07 MiB
2e93bab	6.49 MiB	7.55 MiB	1.07 MiB
9a5040f	6.46 MiB	7.48 MiB	1.01 MiB
f735167	6.46 MiB	7.48 MiB	1.01 MiB
3adbea9	6.52 MiB	7.61 MiB	1.09 MiB

Previous results on branch: fix/screenshot-masking-during-changes

Startup times

Revision	Plain	With Sentry	Diff
9bedc01	454.42 ms	500.27 ms	45.84 ms
d0c6c01	483.34 ms	564.12 ms	80.78 ms
9d4a3f9	442.54 ms	510.83 ms	68.29 ms

App size

Revision	Plain	With Sentry	Diff
9bedc01	6.46 MiB	7.48 MiB	1.02 MiB
d0c6c01	6.46 MiB	7.48 MiB	1.01 MiB
9d4a3f9	6.46 MiB	7.48 MiB	1.02 MiB