fix(backend): various perf optimizations

[fatih-acar]

This should improve read paths when using the following query against the demo data We should actually run this kind of query during the CI benchmark step but that requires loading the demo data...

query {
  InfraDevice {
    edges {
      node {
        name {
          value
        }
        interfaces {
          edges {
            node {
              name {
                value
              }
            }
          }
        }
      }
    }
  }
}

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #3753 will improve performances by 49.88%

_{Comparing fac-some-perf-optim (6cb7a00) with develop (01fd714)}

Summary

⚡ 1 improvements ✅ 9 untouched benchmarks

Benchmarks breakdown

	Benchmark	develop	fac-some-perf-optim	Change
⚡	test_load_node_to_db_node_schema	74.7 ms	49.8 ms	+49.88%