Enable the previously commented-out dedupe-and-write logic in
`start_backfill()` to ensure tsdb stays clean of duplicate
entries.
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Prevent `ValueError` from negative prepend index in
`start_backfill()` by checking buffer space before push
attempts. Truncate incoming frame if needed and stop gracefully
when buffer full.
Also,
- add pre-push capacity check with frame truncation logic
- stop backfill when `next_prepend_index <= 0`
- log warnings for capacity exceeded and buffer-full conditions
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
For now by REPLing them and raising an RTE inside `.ib.feed` as well as
tracing any such cases that make it (from other providers) up to the
`.tsp._history` layer during null-segment backfilling.
Namely insertion writes which over-fill the shm buffer past the latest
tsdb sample via `.tsp._history.shm_push_in_between()`.
Deats,
- check earliest `to_push` timestamp and enter pause point if it's
earlier then the tsdb's `backfill_until_dt` stamp.
- requires actually passing the `backfill_until_dt: datetime` thru,
* `get_null_segs()`
* `maybe_fill_null_segments()`
* `shm_push_in_between()` (obvi XD)
The `await feed_is_live.wait()` is more or less pointless and would only
cause slower startup afaig (as-far-as-i-grok) so i'm masking it here.
This also removes the final `strict_exception_groups=False` use from the
non-tests code base, flipping to the `tractor.trionics` collapser once
and for all!
Gud Boi
Tyler Goodlet