minor fixes

- line jumps on save
- `RE_NUM` declaration point

api/.flake8

@@ -1,4 +1,4 @@
 [flake8]
 max-line-length = 80
-select = C,E,F,W,B,B950
-extend-ignore = E203, E501
+extend-select = B950
+extend-ignore = E203,E501

api/.isort.cfg

@@ -0,0 +1,3 @@
+[settings]
+profile = black
+line_length = 80

api/advent22_api/core/depends.py

@@ -24,6 +24,8 @@ from .helpers import (
     set_len,
 )
 
+RE_NUM = re.compile(r"/(\d+)\.", flags=re.IGNORECASE)
+
 
 async def get_all_sorted_days(
     cal_cfg: CalendarConfig = Depends(get_calendar_config),
@@ -109,11 +111,10 @@ async def get_all_manual_image_names(
     Bilder: "manual" zuordnen
     """
 
-    num_re = re.compile(r"/(\d+)\.", flags=re.IGNORECASE)
     return {
         int(num_match.group(1)): name
         for name in manual_image_names
-        if (num_match := num_re.search(name)) is not None
+        if (num_match := RE_NUM.search(name)) is not None
     }