Fix missed timestamp issues in stats POST handlers

- Fix batstats.py and pitstats.py POST handlers to convert timestamps
- Fix Pydantic model defaults from *100000 to *1000 (wrong multiplier)

Found during second-pass audit.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/routers_v2/batstats.py

@@ -55,7 +55,7 @@ class BatStat(pydantic.BaseModel):
     csc: Optional[int] = 0
     week: int
     season: int
-    created: Optional[int] = int(datetime.timestamp(datetime.now())*100000)
+    created: Optional[int] = int(datetime.timestamp(datetime.now())*1000)
     game_id: int
 
 
@@ -225,7 +225,7 @@ async def post_batstats(stats: BattingStatModel, token: str = Depends(oauth2_sch
             csc=x.csc,
             week=x.week,
             season=x.season,
-            created=x.created,
+            created=datetime.fromtimestamp(x.created / 1000) if x.created else datetime.now(),
             game_id=x.game_id
         )
         new_stats.append(this_stat)

app/routers_v2/pitstats.py

@@ -45,7 +45,7 @@ class PitStat(pydantic.BaseModel):
     bsv: Optional[int] = 0
     week: int
     season: int
-    created: Optional[int] = int(datetime.timestamp(datetime.now())*100000)
+    created: Optional[int] = int(datetime.timestamp(datetime.now())*1000)
     game_id: int
 
 
@@ -157,7 +157,7 @@ async def post_pitstat(stats: PitchingStatModel, token: str = Depends(oauth2_sch
             bsv=x.bsv,
             week=x.week,
             season=x.season,
-            created=x.created,
+            created=datetime.fromtimestamp(x.created / 1000) if x.created else datetime.now(),
             game_id=x.game_id
         )
         new_stats.append(this_stat)