fix(poller): use sleep_coalesce for housekeeping loops

[HonestMajority]

Summary

• Switch keep-alive heartbeat and lost-job detector sleeps from sleep() to sleep_coalesce() so they actually wake when the global manual clock is advanced
• Bump es-entity from 0.10 to 0.10.31 and adapt to its breaking API changes (per-operation error types, maybe_now(), EntityHydrationError, DbOp-based transaction handling)
• Remove the now-dropped es-entity/sim-time feature flag from the sim-time feature

Closes GaloyMoney/volcano-wip#730

Detail

When lana-bank runs with time.mode=manual, the global es-entity Clock never advances autonomously. The keep-alive and lost-job loops used regular sleep(), which registers wakes at intermediate boundaries — boundaries that never arrive with a manual clock, causing both loops to freeze indefinitely.

sleep_coalesce() fires once at the end of Clock::advance() instead of at every intermediate tick, so:

1. The loops actually wake up when advance() is called.
2. Large time jumps don't cause O(advance / interval) spurious wake-ups.

es-entity 0.10.31 migration

The bump required adapting to several breaking changes:

• EsEntityError → EntityHydrationError
• from_es_entity_error! macro removed → manual From impls for generated per-operation error types (JobCreateError, JobFindError, JobModifyError, JobQueryError)
• AtomicOperation::now() → maybe_now()
• EntityEvents::load_first() now returns Option<T>
• DbOp no longer implements Into<Transaction> → split complete_job/reschedule_job into DbOp and Transaction variants
• err = "..." attribute removed from #[es_repo]
• Added constraint = "idx_unique_job_type" for custom index name matching

Test plan

• All 26 existing tests pass (cargo nextest run)
• Clippy clean on both default and --features sim-time
• cargo fmt clean
• Manual clock integration tests deferred — they require a more extensive test harness (global Clock::install_manual(), blocking job runners, DB polling assertions)
• CI green

🤖 Generated with Claude Code

[HonestMajority]

Closing as superseded by #68, which was already merged and addresses the same issue (sleep_coalesce in housekeeping loops + es-entity 0.10.31 bump).