ci: add Xcode 27 SPM build workflow

[itaybre]

Summary

• Add a new GitHub Actions workflow that builds the SDK from source (SPM) with Xcode 27
• Builds all 5 platforms: iOS, watchOS, macOS, tvOS, visionOS
• Separate workflow so failures can be ignored while Xcode 27 is in beta

#skip-changelog

[github-actions]

🚨 Detected changes in high risk code 🚨

High-risk code can easily blow up and is hard to test. We had severe bugs in the past. Be extra careful when changing these files, and have an extra careful look at these:

• .github/file-filters.yml
• .github/workflows/changes-in-high-risk-code.yml
• Sources/Sentry/SentryNSURLSessionTaskSearch.m
• Sources/Sentry/SentryNetworkTracker.m

[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

There are 3 total unresolved issues (including 1 from previous review).

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 7921b0e. Configure here.}

[sentry]

📲 Install Builds

iOS

🔗 App Name	App ID	Version	Configuration
SDK-Size	io.sentry.sample.SDK-Size	9.19.0 (1)	Release

⚙️ sentry-cocoa Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1231.35 ms	1258.91 ms	27.56 ms
Size	24.14 KiB	1.22 MiB	1.20 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
75eb224	1215.57 ms	1244.74 ms	29.17 ms
4c437ea	1241.63 ms	1266.20 ms	24.57 ms
c5c7a29	1223.14 ms	1258.55 ms	35.41 ms
ce1ec47	1212.60 ms	1247.61 ms	35.02 ms
7b6ea60	1230.86 ms	1250.91 ms	20.05 ms
1f2abc8	1209.18 ms	1252.50 ms	43.32 ms
92fada5	1217.60 ms	1252.89 ms	35.30 ms
5804f33	1218.24 ms	1247.67 ms	29.42 ms
3efa7b5	1226.55 ms	1260.66 ms	34.11 ms
72ea638	1224.78 ms	1258.96 ms	34.18 ms

App size

Revision	Plain	With Sentry	Diff
75eb224	24.14 KiB	1.16 MiB	1.13 MiB
4c437ea	24.14 KiB	1.18 MiB	1.15 MiB
c5c7a29	24.14 KiB	1.15 MiB	1.13 MiB
ce1ec47	24.14 KiB	1.15 MiB	1.13 MiB
7b6ea60	24.14 KiB	1.18 MiB	1.15 MiB
1f2abc8	24.14 KiB	1.22 MiB	1.20 MiB
92fada5	24.14 KiB	1.17 MiB	1.15 MiB
5804f33	24.14 KiB	1.18 MiB	1.16 MiB
3efa7b5	24.14 KiB	1.22 MiB	1.19 MiB
72ea638	24.14 KiB	1.18 MiB	1.15 MiB

Previous results on branch: test/xcode_27

Startup times

Revision	Plain	With Sentry	Diff
9298d32	1219.57 ms	1259.93 ms	40.37 ms

App size

Revision	Plain	With Sentry	Diff
9298d32	24.14 KiB	1.22 MiB	1.20 MiB