fix(rpc): do not rely on the order of mtime's in the registry #39219

Job	Run time
Cygwin Build	4m 17s
Format	1m 30s
Ensure no files with CRLF line endings are committed to the repo	6s
Bootstrap (ubuntu-latest)	4m 35s
Nix Build 4.14 (ubuntu-latest)	1m 34s
Nix Tests (ubuntu-latest)	8m 21s
Nix Build (ubuntu-latest)	1m 14s
Nix Build (macos-latest)	2m 13s
Documentation	56s
Test that the utop dev tool can be built and run	9m 7s
Build with OxCaml (ubuntu-latest)	16m 52s
Build (ocaml-compiler.5.4.0,system-msvc, windows-latest, ocaml-compiler.5.4.0-system-msvc, true)	21m 34s
Build (ocaml-base-compiler.5.4.0,system-mingw, windows-latest, ocaml-compiler.5.4.0-system-mingw,...	19m 23s
Build (5.4.x, 5.4.x, ubuntu-latest, true)	13m 41s
Build (4.14.x, 4.14.x, ubuntu-latest)	4m 17s
Build (ocaml-variants.4.14.2+options,ocaml-option-32bit, ocaml-variants.4.14.2-ocaml-option-32bit...	4m 29s
Build (5.4.x, 5.4.x, macos-latest, true)	16m 4s
Build (4.14.x, 4.14.x, macos-latest)	7m 7s
Build (ocaml-variants.5.6.0+trunk, ocaml-variants.5.6.0+trunk, ubuntu-latest)	5m 24s
Build (5.4.x, 5.4.x, macos-15-intel)	4m 34s
Building Dune with OxCaml	34m 35s
Create local opam switch (ubuntu-latest, 5)	5m 53s
Rocq 9.2 (native)	11m 6s
Build microbenchmarks	1m 57s
Rocq 9.2	7m 48s
Wasm_of_ocaml	7m 45s
Create local opam switch (macos-latest, 5)	14m 48s
	3h 51m 10s

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