`accouning.calc`: enable crash handlers on `debug_mode` input (via test harness)

piker/accounting/calc.py

@@ -32,6 +32,7 @@ from typing import (
     TYPE_CHECKING,
 )
 
+from tractor.devx import maybe_open_crash_handler
 import polars as pl
 from pendulum import (
     DateTime,
@@ -290,9 +291,7 @@ def iter_by_dt(
 
         # XXX: should never get here..
         else:
-            if debug:
-                import tractor
-                with tractor.devx.maybe_open_crash_handler():
+            with maybe_open_crash_handler(pdb=True):
                 raise ValueError(
                     f'Invalid txn time ??\n'
                     f'txn-id: {k!r}\n'
@@ -386,6 +385,7 @@ def open_ledger_dfs(
     acctname: str,
 
     ledger: TransactionLedger | None = None,
+    debug_mode: bool = False,
 
     **kwargs,
 
@@ -400,8 +400,7 @@ def open_ledger_dfs(
     can update the ledger on exit.
 
     '''
-    from piker.toolz import open_crash_handler
-    with open_crash_handler():
+    with maybe_open_crash_handler(pdb=debug_mode):
         if not ledger:
             import time
             from ._ledger import open_trade_ledger