Add curated Lean Pool, Physlib, and CSLib

Append 5,173 cleaned Lean source chunks from Vilin97/lean-pool@8996c19, leanprover-community/physlib@cf1d86d, and leanprover/cslib@4bec19f. Excludes challenges, active sorry/admit and dependent Physlib files, PhyslibAlpha, tests/scripts/root aggregators, and generated or numeric-heavy data. Adds 19.41M Qwen2.5-Coder tokens or 23.13M DeepSeek-Prover-V2 tokens.

hf_cpt_dataset.jsonl

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f9b516d5b16370809939f5eba234746629c3de78e079cc6dd1f4c8549e9ad109
-size 383367344
+oid sha256:ed7e4d8cd294167eaf34a777097957c1cd0b420d606d3dbe3ae444ab0987395e
+size 442541235