[EPAC-2035]: Implement Saskatchewan recorded votes parser

[riddim-developer-bot]

Why

Saskatchewan recorded-votes parsing was implemented on an older schema head and then drifted behind main. This update keeps the PR branch compatible with the current migration graph while preserving the new parser, fixture, and tests.

What changed

• Added SaskatchewanVotesParser plus a Saskatchewan Votes and Proceedings XML fixture and parser tests.
• Added Fetch.ingestSaskatchewanVotes(document:sittingDate:) to persist parsed Saskatchewan votes.
• Preserved main's SchemaV9 member-jurisdiction migration and moved the vote-jurisdiction change into a new SchemaV10 with a V9 -> V10 migration.
• Updated app and test ModelContainer setup to use the latest schema head.
• Resolved the existing PR rebase conflicts and force-pushed the repaired branch.

Trade-offs not taken

• This PR still does not wire Saskatchewan vote ingestion into the live Saskatchewan adapter flow. The branch now contains the parser and persistence hook, but no current call site invokes ingestSaskatchewanVotes(...) yet.
• The HTML fallback in SaskatchewanVotesParser remains a stub returning no votes; this fix pass focused on finishing the rebase safely instead of inventing a broader HTML parsing strategy during PR repair.

Test plan

• cd ios && make build
  Result: passed after rebasing onto origin/main. The only warning is the pre-existing SchemaV5.RecordedVote redundant Sendable conformance already present on main.
• cd ios && make test
  Result: failed before running the PR's tests because the vendored Evidence package does not compile in this environment: .build/SourcePackages/checkouts/evidence/Sources/Evidence/EvidenceApplication.swift:113:9: 'open' is only available in iOS 16.4 or newer.
• swiftlint --strict
  Result: repo-wide failure from unrelated baseline violations in other targets (epacUITests, epac-clip, epac-widget, etc.).
• File-scoped lint on all modified Swift files with /opt/homebrew/bin/swiftlint lint --strict <path>
  Result: passed for every file changed in this PR.
• python3 scripts/localization/check_localizations.py --github-warnings
  Result: reported the pre-existing missing onboarding.welcome.title key in both English and French.

Refs EPAC-2035

Reviewer-Boundary: review-only

[riddim-developer-bot]

Post-rebase update:

• Resolved the Model.swift / Migration.swift conflicts by keeping main's SchemaV9 member-jurisdiction migration and advancing the vote-jurisdiction work to SchemaV10.
• Force-pushed the repaired branch to symphony/epac-2035-implement-saskatchewan-recorded-votes-parser.
• Re-ran cd ios && make build after rebasing onto the latest origin/main; build passed.
• cd ios && make test is still blocked by the existing EvidenceApplication.swift iOS 16.4 availability compile failure before the Saskatchewan tests can execute.
• File-scoped SwiftLint passed on every modified Swift file.

Residual functional gap from the current branch: the Saskatchewan votes parser/persistence hook exists, but no live Saskatchewan adapter call site invokes it yet.