feat: fail screenshot/replay creation when a potentially sensitive widget is not masked

[vaind]

📜 Description

When a potentionally sensitive-content-containing widget is encountered and it is not masked (or unmasked explicitly), fail capturing replay in debug build by throwing an exception.

💡 Motivation and Context

This should help point users that they need to make adjustments to the privacy configuration. The code is only included in debug builds so it won't affect release builds in any way.

💚 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]

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

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

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

- fail screenshot/replay creation when a potentially sensitive widget is not masked ([#2375](https://github.com/getsentry/sentry-dart/pull/2375))

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 bb49dd5

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 85.01%. Comparing base (8f95e33) to head (bb49dd5).

Files with missing lines	Patch %	Lines
flutter/lib/src/sentry_replay_options.dart	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2375      +/-   ##
==========================================
+ Coverage   84.78%   85.01%   +0.22%     
==========================================
  Files         253       79     -174     
  Lines        9070     2796    -6274     
==========================================
- Hits         7690     2377    -5313     
+ Misses       1380      419     -961     

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

[github-actions]

Android Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	523.42 ms	570.79 ms	47.37 ms
Size	6.49 MiB	7.57 MiB	1.08 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
117d988	376.32 ms	450.85 ms	74.53 ms
b98109e	296.46 ms	362.68 ms	66.22 ms
90a08ea	477.25 ms	534.10 ms	56.85 ms
40680d3	323.55 ms	390.29 ms	66.73 ms
deaeece	347.42 ms	381.10 ms	33.68 ms
95d0636	301.46 ms	357.98 ms	56.52 ms
24b6e60	440.64 ms	557.96 ms	117.32 ms
c328ffc	394.35 ms	480.94 ms	86.59 ms
26e955b	369.52 ms	458.60 ms	89.07 ms
8d64376	302.88 ms	356.84 ms	53.96 ms

App size

Revision	Plain	With Sentry	Diff
117d988	6.33 MiB	7.26 MiB	947.03 KiB
b98109e	6.06 MiB	7.03 MiB	993.53 KiB
90a08ea	6.49 MiB	7.55 MiB	1.06 MiB
40680d3	6.06 MiB	7.03 MiB	989.25 KiB
deaeece	5.94 MiB	6.96 MiB	1.02 MiB
95d0636	6.16 MiB	7.14 MiB	1007.32 KiB
24b6e60	6.33 MiB	7.26 MiB	950.14 KiB
c328ffc	6.35 MiB	7.42 MiB	1.07 MiB
26e955b	6.27 MiB	7.20 MiB	956.49 KiB
8d64376	5.94 MiB	6.96 MiB	1.02 MiB

Previous results on branch: feat/fail-unmasked-sensitive-widgets

Startup times

Revision	Plain	With Sentry	Diff
16bd19d	543.83 ms	574.56 ms	30.73 ms

App size

Revision	Plain	With Sentry	Diff
16bd19d	6.49 MiB	7.57 MiB	1.08 MiB

[github-actions]

iOS Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1249.61 ms	1282.61 ms	33.00 ms
Size	8.38 MiB	9.75 MiB	1.37 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
a7acb24	1296.71 ms	1317.69 ms	20.98 ms
1e094d3	1237.54 ms	1243.51 ms	5.97 ms
ca9f398	1227.29 ms	1236.20 ms	8.92 ms
6f3717a	1259.84 ms	1280.90 ms	21.06 ms
0118295	1211.31 ms	1227.02 ms	15.71 ms
2e1e4ae	1254.41 ms	1278.55 ms	24.14 ms
136c365	1248.12 ms	1277.33 ms	29.20 ms
689d2fd	1257.71 ms	1265.16 ms	7.45 ms
d7758e8	1271.69 ms	1288.08 ms	16.39 ms
d61cecf	1276.96 ms	1290.02 ms	13.06 ms

App size

Revision	Plain	With Sentry	Diff
a7acb24	8.16 MiB	9.17 MiB	1.01 MiB
1e094d3	8.29 MiB	9.37 MiB	1.08 MiB
ca9f398	8.38 MiB	9.74 MiB	1.36 MiB
6f3717a	8.33 MiB	9.62 MiB	1.29 MiB
0118295	8.32 MiB	9.38 MiB	1.05 MiB
2e1e4ae	8.34 MiB	9.65 MiB	1.31 MiB
136c365	8.38 MiB	9.75 MiB	1.37 MiB
689d2fd	8.10 MiB	9.16 MiB	1.06 MiB
d7758e8	8.15 MiB	9.12 MiB	989.76 KiB
d61cecf	8.10 MiB	9.18 MiB	1.08 MiB

Previous results on branch: feat/fail-unmasked-sensitive-widgets

Startup times

Revision	Plain	With Sentry	Diff
16bd19d	1223.20 ms	1234.47 ms	11.27 ms

App size

Revision	Plain	With Sentry	Diff
16bd19d	8.38 MiB	9.75 MiB	1.37 MiB