fix: complete site parser source workflow

src/vk_parser_app/source_adapters.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import json
 from dataclasses import dataclass, field
 from datetime import datetime, timezone
 from typing import Any
@@ -9,6 +10,18 @@ import aiohttp
 from .constants import PLATFORM_SITE, PLATFORM_VK
 
 
+def json_object(value: Any) -> dict[str, Any]:
+    if isinstance(value, dict):
+        return dict(value)
+    if isinstance(value, str):
+        try:
+            parsed = json.loads(value)
+        except json.JSONDecodeError:
+            return {}
+        return parsed if isinstance(parsed, dict) else {}
+    return {}
+
+
 @dataclass
 class SourceMedia:
     url: str
@@ -42,6 +55,12 @@ def validate_source_config(platform: str, config: dict[str, Any]) -> None:
         raise ValueError("max_items должен быть целым числом") from exc
     if not 1 <= max_items <= 100:
         raise ValueError("max_items должен быть от 1 до 100")
+    try:
+        interval_minutes = int(config.get("interval_minutes", 30))
+    except (TypeError, ValueError) as exc:
+        raise ValueError("interval_minutes должен быть целым числом") from exc
+    if not 1 <= interval_minutes <= 10080:
+        raise ValueError("interval_minutes должен быть от 1 до 10080")
 
 
 def _posted_at(value: Any) -> datetime:
@@ -72,9 +91,9 @@ class SiteParserClient:
     async def fetch(self, source: dict) -> tuple[list[SourceItem], dict[str, Any] | None]:
         if not self.base_url or not self.token:
             raise RuntimeError("Site Parser URL или токен не настроены")
-        config = dict(source.get("settings_json") or {})
+        config = json_object(source.get("settings_json"))
         validate_source_config(PLATFORM_SITE, config)
-        runtime_state = dict(source.get("runtime_state_json") or {})
+        runtime_state = json_object(source.get("runtime_state_json"))
         payload = {
             "url": source["url"],
             "config": config,