chore: Minor formatting fixes (whitespace cleanup)

infrastructure.md

@@ -105,6 +105,7 @@ Real-time updates for downloads, scans, and queue operations.
 
 **Series Identifier in Messages:**
 All series-related WebSocket events include `key` as the primary identifier in their data payload:
+
 ```json
 {
     "type": "download_progress",

src/server/models/anime.py

@@ -16,7 +16,6 @@ from typing import List, Optional
 
 from pydantic import BaseModel, Field, HttpUrl, field_validator
 
-
 # Regex pattern for valid series keys (URL-safe, lowercase with hyphens)
 KEY_PATTERN = re.compile(r'^[a-z0-9][a-z0-9-]*[a-z0-9]$|^[a-z0-9]$')