[EPAC-2036]: implement Saskatchewan MLA member directory adapter

[riddim-developer-bot]

Summary

• add SaskatchewanMemberDirectoryAdapter to parse the Legislative Assembly roster HTML into ParliamentMember rows tagged with Jurisdiction.saskatchewan
• add SchemaV9 migration support for ParliamentMember.jurisdiction plus a stored directoryKey so federal and Saskatchewan members can coexist without name collisions
• wire Saskatchewan member ingestion through Fetch.downloadMembers(jurisdiction:) and add roster fixture plus adapter/runtime migration tests

Verification

• scripts/check-boundaries.sh
• cd ios && make build
• cd ios && xcodebuild build-for-testing -project epac.xcodeproj -scheme epac -destination 'platform=iOS Simulator,id=A42F2FBA-FC7A-4EFF-8F85-C402A8850ED6' -derivedDataPath .build -only-testing:epacTests/SaskatchewanMemberDirectoryAdapterTests -only-testing:epacTests/RuntimeDataPathTests -only-testing:epacTests/MigrationPlanTests -only-testing:epacTests/ModelTests -quiet | xcbeautify --quiet
• python3 scripts/localization/check_localizations.py --github-warnings
• cd ios && swiftlint lint --strict epacTests/RuntimeDataPathTests.swift epacTests/Hansard/SaskatchewanMemberDirectoryAdapterTests.swift epac/Model/Fetch.swift epac/Data/Adapters/Hansard/SaskatchewanMemberDirectoryAdapter.swift epac/Model/Model.swift

Skipped / blocked

• cd ios && xcodebuild test ... could not run in this container because simulator launches fail with IDEPseudoTerminalDomain Code=7 / openpty: Device not configured before tests execute.
• cd ios && swiftlint --strict is not clean on this branch before or after this change because of existing repo-wide violations, including vendored .build/SourcePackages files and unrelated test targets.
• python3 scripts/localization/check_localizations.py --github-warnings still reports the pre-existing missing key onboarding.welcome.title in both English and French tables.

Reviewer-Boundary: review-only