scripts: lint every tracked markdown file

The markdown lint wrapper names README.md and docs/ explicitly, so
documents like AGENTS.md, CONTRIBUTING.md and RELEASING.md have never
been linted and accumulated findings silently.

Derive the file list from git ls-files instead, excluding
CHANGELOG.md - generated by the release process, where long
release-note URLs and per-release repeated section headers are part
of the format - and CLAUDE.md, a symlink to the already-linted
AGENTS.md. New documents are picked up automatically.

Signed-off-by: Igor Opaniuk <igor.opaniuk@oss.qualcomm.com>

scripts/markdownlint_wrapper.sh

@@ -8,9 +8,11 @@ ROOT_PATH="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )/../"
 # Run consistently from the repo root regardless of where the script is called
 cd "$ROOT_PATH"
 
-# Files to lint. mdl scans directories recursively, so everything under
-# docs/ is covered automatically.
-MARKDOWN_FILES=("README.md" "docs/")
+# Lint every markdown file tracked in git, except:
+#  - CHANGELOG.md: generated by the release process; long release-note
+#    URLs and per-release repeated section headers are part of the format
+#  - CLAUDE.md: a symlink to AGENTS.md, which is already linted
+mapfile -t MARKDOWN_FILES < <(git ls-files '*.md' ':!CHANGELOG.md' ':!CLAUDE.md')
 
 run_lint() {
 	if ! command -v mdl >/dev/null 2>&1; then