add database and migration logic (#27)

* update chat_microservice

* reformat logger_conf

* add database

* add service and repository logic

* fix constants gpt base url

* add models endpoints

bot_microservice/settings/config.py

@@ -6,6 +6,7 @@ from typing import Any
 from dotenv import load_dotenv
 from pydantic import model_validator
 from pydantic_settings import BaseSettings
+from yarl import URL
 
 from constants import API_PREFIX
 
@@ -52,6 +53,9 @@ class AppSettings(SentrySettings, BaseSettings):
     DOMAIN: str = "https://localhost"
     URL_PREFIX: str = ""
 
+    DB_FILE: Path = SHARED_DIR / "chat_gpt.db"
+    DB_ECHO: bool = False
+
     # ==== gpt settings ====
     GPT_MODEL: str = "gpt-3.5-turbo-stream-DeepAi"
     GPT_BASE_HOST: str = "http://chat_service:8858"
@@ -91,6 +95,18 @@ class AppSettings(SentrySettings, BaseSettings):
     def bot_webhook_url(self) -> str:
         return "/".join([self.api_prefix, self.token_part])
 
+    @cached_property
+    def db_url(self) -> URL:
+        """
+        Assemble database URL from settings.
+
+        :return: database URL.
+        """
+        return URL.build(
+            scheme="sqlite+aiosqlite",
+            path=f"///{self.DB_FILE}",
+        )
+
     class Config:
         case_sensitive = True