`.tsp._history`: drop `feed_is_live` syncing, another seg flag
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!hist_backfill_fixes
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				|  | @ -886,7 +886,7 @@ async def load_tsdb_hist( | |||
|     np.ndarray, | ||||
|     DateTime, | ||||
|     DateTime, | ||||
| ] | None: | ||||
| ]|None: | ||||
|     # loads a (large) frame of data from the tsdb depending | ||||
|     # on the db's query size limit; our "nativedb" (using | ||||
|     # parquet) generally can load the entire history into mem | ||||
|  | @ -899,7 +899,7 @@ async def load_tsdb_hist( | |||
|         DateTime, | ||||
|     ] | ||||
|     try: | ||||
|         tsdb_entry: tuple | None =  await storage.load( | ||||
|         tsdb_entry: tuple|None =  await storage.load( | ||||
|             fqme, | ||||
|             timeframe=timeframe, | ||||
|         ) | ||||
|  | @ -1046,12 +1046,15 @@ async def tsdb_backfill( | |||
|                     last_tsdb_dt, | ||||
|                 ) = tsdb_entry | ||||
| 
 | ||||
|             # await tractor.pause() | ||||
| 
 | ||||
|             # if there is a gap to backfill from the first | ||||
|             # history frame until the last datum loaded from the tsdb | ||||
|             # continue that now in the background | ||||
|             async with trio.open_nursery( | ||||
|                 strict_exception_groups=False, | ||||
|             ) as tn: | ||||
|             async with ( | ||||
|                 tractor.trionics.collapse_eg(), | ||||
|                 trio.open_nursery() as tn, | ||||
|             ): | ||||
| 
 | ||||
|                 bf_done = await tn.start( | ||||
|                     partial( | ||||
|  | @ -1322,8 +1325,14 @@ async def manage_history( | |||
|     # TODO: maybe it should be a subpkg of `.data`? | ||||
|     from piker import storage | ||||
| 
 | ||||
|     storemod: ModuleType | ||||
|     client: StorageClient | ||||
|     tn: trio.Nursery | ||||
|     async with ( | ||||
|         storage.open_storage_client() as (storemod, client), | ||||
|         storage.open_storage_client() as ( | ||||
|             storemod, | ||||
|             client, | ||||
|         ), | ||||
| 
 | ||||
|         # NOTE: this nursery spawns a task per "timeframe" (aka | ||||
|         # sampling period) data set since normally differently | ||||
|  | @ -1392,7 +1401,7 @@ async def manage_history( | |||
|             some_data_ready.set() | ||||
| 
 | ||||
|             # wait for a live feed before starting the sampler. | ||||
|             await feed_is_live.wait() | ||||
|             # await feed_is_live.wait() | ||||
| 
 | ||||
|             # yield back after client connect with filled shm | ||||
|             task_status.started(( | ||||
|  |  | |||
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