`.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!

piker/accounting/calc.py

@@ -289,15 +289,26 @@ def iter_by_dt(
             else:
                 continue
 
-        # XXX: should never get here..
+        # XXX: we should never really get here bc it means some kinda
+        # bad txn-record (field) data..
+        #
+        # -> set the `debug_mode = True` if you want to trace such
+        # cases from REPL ;)
         else:
-            with maybe_open_crash_handler(pdb=True):
-                raise ValueError(
+            debug_mode: bool = False
+            report: str = (
                 f'Invalid txn time ??\n'
                 f'txn-id: {k!r}\n'
                 f'{k!r}: {v!r}\n'
             )
-                    # assert v is not None, f'No valid value for `{k}`!?'
+            if debug_mode:
+                with maybe_open_crash_handler(
+                    pdb=debug_mode,
+                    raise_on_exit=False,
+                ):
+                    raise ValueError(report)
+            else:
+                log.error(report)
 
             if _invalid is not None:
                 _invalid.append(tx)
@@ -400,7 +411,10 @@ def open_ledger_dfs(
     can update the ledger on exit.
 
     '''
-    with maybe_open_crash_handler(pdb=debug_mode):
+    with maybe_open_crash_handler(
+        pdb=debug_mode,
+        # raise_on_exit=False,
+    ):
         if not ledger:
             import time
             from ._ledger import open_trade_ledger

piker/tsp/__init__.py

@@ -35,6 +35,7 @@ from ._anal import (
     dedupe as dedupe,
     detect_time_gaps as detect_time_gaps,
     pl2np as pl2np,
+    np2pl as np2pl,
 
     # `numpy` only
     slice_from_time as slice_from_time,

piker/tsp/_history.py

@@ -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((