feat(ci): add framework architecture validation and verification

[philprime]

Adds a new validate-xcframework-architectures.sh script that verifies each XCFramework slice contains exactly the architectures declared in its Info.plist. This catches build misconfigurations (e.g. missing arm64e, wrong simulator archs) before the framework ships.

Architecture validation script

Parses the XCFramework Info.plist, resolves the binary path for each library entry (supporting both .framework bundles and bare libraries, including versioned macOS layouts), and compares lipo -archs output against the declared SupportedArchitectures. Runs in both CI (assemble-xcframework-variant.yml) and local builds (build-xcframework-local.sh).

Build script improvements

Refactors build-xcframework-slice.sh to use bash arrays for xcodebuild arguments instead of long inline invocations. Adds explicit generic/platform= destinations for macOS and Mac Catalyst builds to ensure correct architecture selection. Fixes OTHER_LDFLAGS handling to append -make_mergeable rather than overwrite existing flags. Also adds codesign --verify after signing and supports comma-separated SDK lists in build-xcframework-variant.sh.

Extracted from #7598

#skip-changelog

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Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1221.37 ms	1249.90 ms	28.53 ms
Size	24.14 KiB	1.16 MiB	1.13 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
c67ced3	1223.22 ms	1256.15 ms	32.93 ms
44b7b59	1211.91 ms	1248.90 ms	36.99 ms
ffb6adc	1218.60 ms	1247.47 ms	28.87 ms
37fd1b7	1227.56 ms	1262.45 ms	34.89 ms
787537a	1218.35 ms	1251.72 ms	33.38 ms
92bcc8f	1233.43 ms	1270.20 ms	36.77 ms
65c13c5	1234.47 ms	1263.10 ms	28.63 ms
53097d6	1218.02 ms	1251.70 ms	33.68 ms
8180609	1214.67 ms	1243.36 ms	28.69 ms
ce900e7	1212.40 ms	1244.57 ms	32.18 ms

App size

Revision	Plain	With Sentry	Diff
c67ced3	24.14 KiB	1.16 MiB	1.13 MiB
44b7b59	24.14 KiB	1.15 MiB	1.13 MiB
ffb6adc	24.14 KiB	1.15 MiB	1.12 MiB
37fd1b7	24.14 KiB	1.15 MiB	1.13 MiB
787537a	24.14 KiB	1.15 MiB	1.12 MiB
92bcc8f	24.14 KiB	1.15 MiB	1.13 MiB
65c13c5	24.14 KiB	1.15 MiB	1.12 MiB
53097d6	24.14 KiB	1.16 MiB	1.13 MiB
8180609	24.14 KiB	1.16 MiB	1.13 MiB
ce900e7	24.14 KiB	1.15 MiB	1.13 MiB