chore: add hash to entity macro derives

[cdc-as81]

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[github-actions]

Benchmark Results

Hyperfine

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
large_sir::baseline	3.1 ± 0.2	2.9	4.0	1.00
large_sir::entities	13.1 ± 1.1	12.4	19.9	4.28 ± 0.43

Criterion

Regressions:
  Group                                    Bench                                              Change  CI Lower  CI Upper
  ---------------------------------------  ------------------------------------------------  -------  --------  --------
  sample_entity_single_property_unindexed  10000                                             16.333%   13.433%   19.135%
  sample_entity_single_property_unindexed  100000                                             2.117%    1.771%    2.430%
  large_dataset                            bench_query_population_multi_indexed_entities     10.065%    9.778%   10.354%
  large_dataset                            bench_query_population_derived_property_entities   1.921%    1.570%    2.161%
  sampling                                 sampling_multiple_known_length_entities            1.009%    0.679%    1.279%

Improvements:
  Group                                    Bench                                              Change  CI Lower  CI Upper
  ---------------------------------------  ------------------------------------------------  -------  --------  --------
  sample_entity_single_property_indexed    10000                                             -0.795%   -1.230%   -0.475%
  sample_entity_single_property_unindexed  1000                                              -1.188%   -1.630%   -0.888%
  large_dataset                            bench_filter_unindexed_entity                     -7.473%  -12.243%   -2.528%
  sampling                                 sampling_multiple_unindexed_entities              -0.096%   -0.179%   -0.027%
  sampling                                 sampling_multiple_l_reservoir_entities            -1.976%   -2.564%   -1.304%
  sampling                                 sampling_single_l_reservoir_entities              -1.397%   -1.538%   -1.255%
  sampling                                 sampling_single_known_length_entities             -2.201%   -2.566%   -1.831%
  sample_entity_whole_population           10000                                             -1.546%   -2.043%   -1.100%
  sample_entity_whole_population           100000                                            -2.360%   -2.668%   -1.901%
  sample_entity_whole_population           1000                                              -2.372%   -2.743%   -2.012%

Unchanged:
  Group                                    Bench                                              Change  CI Lower  CI Upper
  ---------------------------------------  ------------------------------------------------  -------  --------  --------
  sample_entity_single_property_indexed    100000                                            -0.053%   -0.471%    0.533%
  sample_entity_single_property_indexed    1000                                              -0.319%   -0.914%    0.244%
  sample_entity_multi_property_indexed     10000                                              0.486%   -0.092%    1.084%
  sample_entity_multi_property_indexed     100000                                             0.210%   -0.275%    0.797%
  sample_entity_multi_property_indexed     1000                                               0.247%   -0.015%    0.460%
  large_dataset                            bench_filter_indexed_entity                       -8.329%  -19.953%    5.113%
  large_dataset                            bench_query_population_property_entities          -0.008%   -0.265%    0.240%
  large_dataset                            bench_match_entity                                -0.059%   -0.501%    0.259%
  large_dataset                            bench_query_population_multi_unindexed_entities   -0.203%   -0.587%    0.334%
  large_dataset                            bench_query_population_indexed_property_entities   0.291%   -0.038%    0.785%
  sampling                                 sampling_single_unindexed_entities                -0.210%   -0.527%    0.021%

[RobertJacobsonCDC]

I remember now that the reason we didn't automatically derive Hash on Property<Entity> is because f64 does not implement Hash, and so something like this gives a compiler error:

 define_property!(struct Weight(f64), Person, default_const = Weight(0.0));

I think we should look for a way around this before committing this PR. I also have some notes about this on the wiki.

If we can't provide a blanket implementation of Hash for Property<E> using the implementation of hash_property_value, say, then we should generate an implementation in define_property!.