fix: allow empty CRAWL_LIMIT env value

Reviewed-on: #8

README.md

@@ -110,4 +110,4 @@ docker compose exec postgres pg_dump -U miem miem_workers > backup.sql
 docker compose down
 ```
 
-Версия сервиса: `0.2.6`. Админка всегда показывает версии backend и frontend в footer.
+Версия сервиса: `0.2.7`. Админка всегда показывает версии backend и frontend в footer.

app/config.py

@@ -1,5 +1,5 @@
 from functools import lru_cache
-from pydantic import Field
+from pydantic import Field, field_validator
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
 
@@ -19,6 +19,13 @@ class Settings(BaseSettings):
     session_secret: str = Field(default="dev-session-secret", min_length=8)
     mcp_token: str = "dev-mcp-token"
 
+    @field_validator("crawl_limit", mode="before")
+    @classmethod
+    def empty_crawl_limit_as_none(cls, value):
+        if value == "":
+            return None
+        return value
+
 
 @lru_cache
 def get_settings() -> Settings:

app/version.py

@@ -1,3 +1,3 @@
-APP_VERSION = "0.2.6"
-FRONTEND_VERSION = "0.2.6"
-BACKEND_VERSION = "0.2.6"
+APP_VERSION = "0.2.7"
+FRONTEND_VERSION = "0.2.7"
+BACKEND_VERSION = "0.2.7"

tests/test_api_mcp.py

@@ -18,7 +18,7 @@ def test_health_returns_versions():
     response = client.get("/api/health")
 
     assert response.status_code == 200
-    assert response.json()["backend_version"] == "0.2.6"
+    assert response.json()["backend_version"] == "0.2.7"
 
 
 def test_mcp_requires_token_and_lists_tools():

tests/test_config.py

@@ -0,0 +1,13 @@
+from app.config import Settings
+
+
+def test_empty_crawl_limit_is_treated_as_none():
+    settings = Settings(crawl_limit="")
+
+    assert settings.crawl_limit is None
+
+
+def test_numeric_crawl_limit_is_parsed():
+    settings = Settings(crawl_limit="25")
+
+    assert settings.crawl_limit == 25