docs: remove issue refs from moduledocs in SpecValidator and Parser

Issue refs belong in commit messages, not persistent module docs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: github-actions[bot]

lib/ptc_runner/lisp/spec_validator.ex

@@ -10,7 +10,7 @@ defmodule PtcRunner.Lisp.SpecValidator do
   and the implementation.
 
   The markdown-parsing half lives in
-  `PtcRunner.Lisp.SpecValidator.Parser` (#899). This module is the
+  `PtcRunner.Lisp.SpecValidator.Parser`. This module is the
   thin orchestration façade: spec I/O + example execution + result
   aggregation + negative-test handling.
 

lib/ptc_runner/lisp/spec_validator/parser.ex

@@ -1,6 +1,6 @@
 defmodule PtcRunner.Lisp.SpecValidator.Parser do
   @moduledoc """
-  Markdown-extraction half of `PtcRunner.Lisp.SpecValidator` (#899).
+  Markdown-extraction half of `PtcRunner.Lisp.SpecValidator`.
 
   Parses the PTC-Lisp specification markdown into structured data —
   testable examples (`{code, expected, section}` tuples), `TODO` and