refactor: modularize API routes into separate files and clean up dependencies

decnet/web/router/logs/api_get_histogram.py

@@ -0,0 +1,18 @@
+from typing import Any, Optional
+
+from fastapi import APIRouter, Depends, Query
+
+from decnet.web.dependencies import get_current_user, repo
+
+router = APIRouter()
+
+
+@router.get("/logs/histogram", tags=["Logs"])
+async def get_logs_histogram(
+    search: Optional[str] = None,
+    start_time: Optional[str] = None,
+    end_time: Optional[str] = None,
+    interval_minutes: int = Query(15, ge=1),
+    current_user: str = Depends(get_current_user)
+) -> list[dict[str, Any]]:
+    return await repo.get_log_histogram(search=search, start_time=start_time, end_time=end_time, interval_minutes=interval_minutes)