`ib` rt pps update hotfix..

Not sure this didn't get caught in usage, but basically real-time
updates got broken by a rework of `update_ledger_from_api_trades()`.
The issue is that the ledger was being updated **before** calling
`piker.pp.update_pps_conf()` which resulted in the `Position.size`
not being updated correctly since the [latest added] clears passed
in via the `trade_records` arg were already found in the `.clears` table
and thus were causing the loop to skip the `Position.lifo_update()`
call..

The solution here is to not update the ledger **until after** we call
`update_pps_conf()` - it's more read/writes but it's correct and we
figure out a less io heavy way to do the file writing later.

Further this includes a fix to avoid double emitting a pp update caused
by non-thorough logic that waits for a commission report to arrive
during a fill event; previously we were emitting the same message twice
due to the lack of a check for an existing comms report in the case
where the report arrives *after* the fill.

piker/brokers/ib/broker.py

@@ -295,7 +295,10 @@ async def update_ledger_from_api_trades(
     trade_entries: list[dict[str, Any]],
     client: Union[Client, MethodProxy],
 
-) -> dict[str, pp.Transaction]:
+) -> tuple[
+    dict[str, pp.Transaction],
+    dict[str, dict],
+]:
 
     conf = get_config()
 
@@ -326,14 +329,12 @@ async def update_ledger_from_api_trades(
 
     # write recent session's trades to the user's (local) ledger file.
     records: dict[str, pp.Transactions] = {}
-    for acctid, trades_by_id in entries.items():
-        with pp.open_trade_ledger('ib', acctid) as ledger:
-            ledger.update(trades_by_id)
 
+    for acctid, trades_by_id in entries.items():
         # normalize to transaction form
         records[acctid] = norm_trade_records(trades_by_id)
 
-    return records
+    return records, entries
 
 
 async def update_and_audit_msgs(
@@ -518,10 +519,14 @@ async def trades_dialogue(
         new_trades = {}
         for account, proxy in proxies.items():
             trades = await proxy.trades()
-            new_trades.update(await update_ledger_from_api_trades(
+            (
+                records_by_acct,
+                ledger_entries,
+            ) = await update_ledger_from_api_trades(
                 trades,
                 proxy,
-            ))
+            )
+            new_trades.update(records_by_acct)
 
         for acctid, trans in new_trades.items():
             for t in trans:
@@ -573,6 +578,16 @@ async def trades_dialogue(
             tuple(name for name in accounts_def if name in accounts),
         ))
 
+        # TODO: maybe just write on teardown?
+        # we might also want to delegate a specific actor for
+        # ledger writing / reading for speed?
+
+        # write ledger with all new trades **AFTER** we've updated the
+        # `pps.toml` from the original ledger state!
+        for acctid, trades_by_id in ledger_entries.items():
+            with pp.open_trade_ledger('ib', acctid) as ledger:
+                ledger.update(trades_by_id)
+
         async with (
             ctx.open_stream() as ems_stream,
             trio.open_nursery() as n,
@@ -609,10 +624,11 @@ async def emit_pp_update(
     proxy = proxies[acctid]
 
     acctname = acctid.strip('ib.')
-    records = (await update_ledger_from_api_trades(
+    records_by_acct, ledger_entries = await update_ledger_from_api_trades(
         [trade_entry],
         proxy,
-    ))[acctname]
+    )
+    records = records_by_acct[acctname]
     r = records[0]
 
     # update and load all positions from `pps.toml`, cross check with
@@ -627,6 +643,12 @@ async def emit_pp_update(
         ledger_reload={r.bsuid: r.fqsn},
     )
 
+    # NOTE: write ledger with all new trades **AFTER** we've updated the
+    # `pps.toml` from the original ledger state!
+    for acctid, trades_by_id in ledger_entries.items():
+        with pp.open_trade_ledger('ib', acctid) as ledger:
+            ledger.update(trades_by_id)
+
     for pos in filter(
         bool,
         [active.get(r.bsuid), closed.get(r.bsuid)]
@@ -760,7 +782,7 @@ async def deliver_trade_events(
                     {
                         'contract': asdict(fill.contract),
                         'execution': asdict(fill.execution),
-                        'commissionReport': asdict(fill.commissionReport),
+                        # 'commissionReport': asdict(fill.commissionReport),
                         # supposedly server fill time?
                         'broker_time': execu.time,
                         'name': 'ib',
@@ -813,6 +835,15 @@ async def deliver_trade_events(
                 trade_entry = ids2fills.setdefault(execid, {})
                 fill_already_rx = bool(trade_entry)
 
+                # only fire a pp msg update if,
+                # - we haven't already
+                # - the fill event has already arrived
+                #   but it didn't yet have a commision report
+                #   which we fill in now.
+                if (
+                    fill_already_rx
+                    and 'commissionReport' not in trade_entry
+                ):
                     # no fill msg has arrived yet so just fill out the
                     # cost report for now and when the fill arrives a pp
                     # msg can be emitted.
@@ -820,7 +851,6 @@ async def deliver_trade_events(
                         {'commissionReport': asdict(cr)}
                     )
 
-                if fill_already_rx:
                     await emit_pp_update(
                         ems_stream,
                         trade_entry,