fixup! Split up server code into modules

piket_server/flask.py

 from typing import Any
 
 from flask import Flask
-from flask_sqlalchemy import SQLAlchemy
+from flask_sqlalchemy import SQLAlchemy  # type: ignore
 
 DATA_HOME = os.environ.get("XDG_DATA_HOME", "~/.local/share")
 CONFIG_DIR = os.path.join(DATA_HOME, "piket_server")

piket_server/routes/settlements.py

 from flask import jsonify, request
 
 from piket_server.flask import app, db
-from piket_server.models import Settlement
+from piket_server.models import Consumption, Settlement
 
 
 @app.route("/settlements", methods=["GET"])

piket_server/seed.py

 import csv
 import os
 
-from piket_server import db, Person, Settlement, ConsumptionType, Consumption
+from piket_server.models import Person, Settlement, ConsumptionType, Consumption
+from piket_server.flask import db
 
 
 def main():
         print("All data removed. Recreating database...")
         db.create_all()
 
-        from alembic.config import Config
-        from alembic import command
+        from alembic.config import Config  # type: ignore
+        from alembic import command  # type: ignore
 
         alembic_cfg = Config(os.path.join(os.path.dirname(__file__), "alembic.ini"))
         command.stamp(alembic_cfg, "head")