Replace Sourcery with swift-mocking for mock generation

[Copilot]

Replaces Sourcery code generation with swift-mocking macros for compile-time mock generation. Removes all Sourcery tooling, stencils, and generated files.

Protocol changes

// sourcery: AutoMockable → @Mocked(compilationCondition: .debug) on all 5 mockable protocols. Added import Mocking to each.

Test migration

Updated mock API across 8 test files:

// Before (Sourcery)
let mock = VersioningMock()
mock.versionNumber = "1.0.0"
mock.buildNumber = "1"
timeProvider.nowReturnValue = Date.date()

// After (swift-mocking)
let mock = VersioningMock()
mock._versionNumber.getter.implementation = .returns("1.0.0")
mock._buildNumber.getter.implementation = .returns("1")
timeProvider._now.implementation = .returns(Date.date())

Dependency & build changes

• Added swift-mocking 0.2.2+ to both ScanNowCore and ScanNowCoreTests targets
• Bumped minimum deployment target from iOS 14 → iOS 16 (required by swift-mocking)

Removed

• sourcery/AutoMockable.stencil
• App/Tests/ScanNowCoreTests/generated/AutoMockable.generated.swift
• App/Tests/ScanNowCoreTests/.sourcery.yml
• krzysztofzablocki/Sourcery@2.3.0 from Mintfile
• fastlane-plugin-sourcery from Pluginfile/Gemfile.lock
• Sourcery steps from Fastfile check_generated_code and generate_code lanes

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• www.swift.org
  • Triggering command: /usr/share/swift/usr/bin/swift-package /usr/share/swift/usr/bin/swift-package resolve (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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