Mutation lock for server

[ljeub-pometry]

What changes were proposed in this pull request?

• Add locking around the working directory to avoid problems with concurrent mutations

Why are the changes needed?

Does this PR introduce any user-facing change? If yes is this documented?

How was this patch tested?

Are there any further changes required?

[github-actions]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark 'Rust Benchmark'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 2.

Benchmark suite	Current: 868453e	Previous: 9823ef7	Ratio
lotr_graph/num_edges	4 ns/iter (± 0)	0 ns/iter (± 0)	+∞
lotr_graph/num_nodes	4 ns/iter (± 0)	1 ns/iter (± 0)	4
lotr_graph/has_node_nonexisting	5 ns/iter (± 0)	2 ns/iter (± 0)	2.50
lotr_graph/graph_latest	3 ns/iter (± 0)	0 ns/iter (± 0)	+∞
lotr_graph_materialise/materialize	7659179 ns/iter (± 23595)	1564816 ns/iter (± 35303)	4.89
lotr_graph_window_100/num_nodes	13 ns/iter (± 0)	5 ns/iter (± 0)	2.60
lotr_graph_window_100_materialise/materialize	7730628 ns/iter (± 25365)	1669150 ns/iter (± 10700)	4.63
lotr_graph_window_10/has_node_existing	136 ns/iter (± 9)	62 ns/iter (± 11)	2.19
lotr_graph_window_10_materialise/materialize	3225864 ns/iter (± 11836)	971980 ns/iter (± 4278)	3.32
lotr_graph_subgraph_10pc_materialise/materialize	1988956 ns/iter (± 16405)	334634 ns/iter (± 1287)	5.94
lotr_graph_subgraph_10pc_windowed/has_node_existing	140 ns/iter (± 9)	62 ns/iter (± 14)	2.26
lotr_graph_subgraph_10pc_windowed_materialise/materialize	1201004 ns/iter (± 7466)	230399 ns/iter (± 2617)	5.21
lotr_graph_window_50_layered/num_edges_temporal	141327 ns/iter (± 1954)	70121 ns/iter (± 7586)	2.02
lotr_graph_window_50_layered/has_node_existing	384 ns/iter (± 20)	129 ns/iter (± 12)	2.98
lotr_graph_window_50_layered/has_node_nonexisting	5 ns/iter (± 0)	2 ns/iter (± 0)	2.50
lotr_graph_window_50_layered/graph_latest	82019 ns/iter (± 1454)	36649 ns/iter (± 916)	2.24
lotr_graph_window_50_layered_materialise/materialize	28179110 ns/iter (± 85547)	3488825 ns/iter (± 24948)	8.08
lotr_graph_persistent_window_50_layered/num_edges_temporal	576433 ns/iter (± 3849)	192686 ns/iter (± 1569)	2.99
lotr_graph_persistent_window_50_layered/has_node_existing	410 ns/iter (± 343)	174 ns/iter (± 83)	2.36
lotr_graph_persistent_window_50_layered/has_node_nonexisting	5 ns/iter (± 0)	2 ns/iter (± 0)	2.50
lotr_graph_persistent_window_50_layered/graph_latest	118731 ns/iter (± 3658)	57549 ns/iter (± 4809)	2.06
lotr_graph_persistent_window_50_layered_materialise/materialize	48316750 ns/iter (± 98456)	5298035 ns/iter (± 147912)	9.12

This comment was automatically generated by workflow using github-action-benchmark.