fix(deps): address codex P1/P2 + CodeRabbit findings

- deltalake 0.31 -> 0.32 (codex P1): the previous pin pulled
  datafusion 52 + arrow 57 transitively, conflicting with the
  workspace's DF53 + arrow 58 after the lance 6.0 bump.
  DeltaTableProvider implements the wrong TableProvider trait
  in default builds with delta enabled.

- lance-graph-python: datafusion 51 -> 53, pyo3 0.26 -> 0.28
  (codex P2 + cargo resolve): arrow-pyarrow 58.0 transitively
  requires pyo3 0.28; only one crate can link "python" so the
  0.26 + 0.28 coexistence is unresolvable. DF51 also incompatible
  with the SessionContext/Arrow 58 types now flowing through
  graph.rs into MemTable::try_new.

- surreal_container: drop stale BLOCKED(A)/(B) comments
  (CodeRabbit): pins are =6.0.0 / =0.29.0, no longer blocked.

Local cargo check --workspace --all-features passes.

Author: claude