test(parity): port 168 RAFT and JetStream cluster Go tests + DB update (B10+B11)
- RaftGoParityTests.cs: 86 tests covering elections, log replication, snapshots,
membership changes, peer tracking (Go ref: raft_test.go)
- JetStreamClusterGoParityTests.cs: 66 tests covering stream/consumer CRUD,
placement, leader failover, meta group (Go ref: jetstream_cluster_*_test.go)
- StreamReplicaGroupApplyTests.cs: 16 tests for per-stream RAFT apply logic
- test_parity.db: 1,241 mapped Go tests (up from 1,148, +93 new mappings)
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