Constant SELECT_PENDING_WAITPOINTS_PAGE_SQL 

pub const SELECT_PENDING_WAITPOINTS_PAGE_SQL: &str = "SELECT waitpoint_id, waitpoint_key, state, required_signal_names, \
            created_at_ms, activated_at_ms, expires_at_ms, token_kid, token \
       FROM ff_waitpoint_pending \
      WHERE partition_key = ?1 \
        AND execution_id  = ?2 \
        AND state IN ('pending', 'active') \
        AND (?3 IS NULL OR waitpoint_id > ?3) \
      ORDER BY waitpoint_id \
      LIMIT ?4";

Cursor-paginated scan of ff_waitpoint_pending for one execution. Filters to state IN ('pending','active') (matches Valkey’s client-side keep filter). Fetches limit + 1 to detect “more to come” without a second round-trip.

Binds:

1. partition_key (i64)
2. execution_id BLOB
3. after_waitpoint_id BLOB — NULL → no cursor
4. limit_plus_one (i64)