refactor(backend): ♻️ cleanup HTTP service classes and remove database singleton (#687)

* refactor(backend): ♻️ cleanup duplicate code in http services

* refactor(backend): ♻️ refactor database away from singleton design

removed the database single and instead injected the session into a new Database class that is created during each request life-cycle. Now sessions no longer need to be passed into each method on the database

All tests pass, but there are likely some hidden breaking changes that were not discovered.

* fix venv

* disable venv cache

* fix install script

* bump poetry version

* postgres fixes

* revert install

* fix db initialization for postgres

* add postgres to docker

* refactor(backend): ♻️ cleanup unused and duplicate code in http services

* refactor(backend): remove sessions from arguments

* refactor(backend): ♻️ convert units and ingredients to use http service class

* test(backend): ✅ add unit and food tests

* lint

* update tags

* re-enable cache

* fix missing fraction in db

* fix lint

Co-authored-by: hay-kot <hay-kot@pm.me>

mealie/services/migrations/_migration_base.py

@@ -7,7 +7,7 @@ import yaml
 from pydantic import BaseModel
 
 from mealie.core import root_logger
-from mealie.db.database import db
+from mealie.db.database import get_database
 from mealie.schema.admin import MigrationImport
 from mealie.schema.recipe import Recipe
 from mealie.schema.user.user import PrivateUser
@@ -37,6 +37,10 @@ class MigrationBase(BaseModel):
 
     user: PrivateUser
 
+    @property
+    def db(self):
+        return get_database(self.session)
+
     @property
     def temp_dir(self) -> TemporaryDirectory:
         """unpacks the migration_file into a temporary directory
@@ -66,7 +70,7 @@ class MigrationBase(BaseModel):
         with open(yaml_file, "r") as f:
             contents = f.read().split("---")
             recipe_data = {}
-            for x, document in enumerate(contents):
+            for _, document in enumerate(contents):
 
                 # Check if None or Empty String
                 if document is None or document == "":
@@ -172,7 +176,7 @@ class MigrationBase(BaseModel):
             exception = ""
             status = False
             try:
-                db.recipes.create(self.session, recipe.dict())
+                self.db.recipes.create(recipe.dict())
                 status = True
 
             except Exception as inst: