Add replay cursor Quint contracts

[russellromney]

Summary

• add Quint replay-cursor safety/progress specs and Makefile targets
• add Rust replay-cursor bridge/contract tests
• harden replay cursor publishing/resume semantics in the tiered VFS
• remove planning-artifact names from the touched replay-cursor implementation surface

Tests

• make specs-all
• cargo test --features zstd,bundled-sqlite replay_cursor_contract
• cargo test --features zstd,bundled-sqlite tiered::wire::tests
• git diff --check

Notes

• Requires local Java/Quint/Apalache tooling for the formal spec targets.
• This is the Turbolite dependency for the haqlite replay-cursor orchestration PR.