Add TKT API v2

[vamsii777]

Summary

• Congregation now owns a framework-agnostic sync surface (SyncQuery, SyncPage, typed list queries) so apps page and filter members, seekers, tasks, users, courses, family records, and spiritual records without depending on Salesforce envelopes.
• SalesforceClient talks to /services/apexrest/v2/* through TktApiV2Client (SalesforceClient.v2). Legacy v1 member/seeker routes stay as deprecated shims.
• CongregationKit exposes v2 handlers (tasks, users, courses, familyRecords, spiritualRecords) plus paginated fetchAll(query:filters:) on members and seekers. Household Family/FamilyTree and RFID remain first-class domain types; v2 /families maps to FamilyRecord with a cardIssued snapshot only.

Test plan

• swift build
• swift test --filter V2DecodeTests
• swift format lint --strict --recursive .
• Confirm api-check.yml expectations: this PR intentionally expands the public API
• Live handler tests against Salesforce when SF_CLIENT_ID, SF_CLIENT_SECRET, SF_USERNAME, and SF_PASSWORD are set