Add docstring for heap_size_in_bytes

src/MLJInterface.jl

@@ -492,6 +492,11 @@ function tag_with_docstring(model_name::Symbol, description::String, bottom_matt
         which is the number of processes to use, as well as the `lazy` keyword argument.
         For example, if set up on a slurm cluster, you could pass
         `addprocs_function = addprocs_slurm`, which will set up slurm processes.
+    - `heap_size_hint_in_bytes::Union{Int,Nothing}=nothing`: On Julia 1.9+, you may set the `--heap-size-hint`
+        flag on Julia processes, recommending garbage collection once a process
+        is close to the recommended size. This is important for long-running distributed
+        jobs where each process has an independent memory, and can help avoid
+        out-of-memory errors. By default, this is set to `Sys.free_memory() / numprocs`.
     - `runtests::Bool=true`: Whether to run (quick) tests before starting the
         search, to see if there will be any problems during the equation search
         related to the host environment.

src/SymbolicRegression.jl

@@ -291,6 +291,11 @@ which is useful for debugging and profiling.
     which is the number of processes to use, as well as the `lazy` keyword argument.
     For example, if set up on a slurm cluster, you could pass
     `addprocs_function = addprocs_slurm`, which will set up slurm processes.
+- `heap_size_hint_in_bytes::Union{Int,Nothing}=nothing`: On Julia 1.9+, you may set the `--heap-size-hint`
+    flag on Julia processes, recommending garbage collection once a process
+    is close to the recommended size. This is important for long-running distributed
+    jobs where each process has an independent memory, and can help avoid
+    out-of-memory errors. By default, this is set to `Sys.free_memory() / numprocs`.
 - `runtests::Bool=true`: Whether to run (quick) tests before starting the
     search, to see if there will be any problems during the equation search
     related to the host environment.