chore: add .git-blame-ignore-revs for the renormalize commit

git blame and the GitHub web UI both honor .git-blame-ignore-revs at
the repo root. The previous commit was pure line-ending churn (no
content change), so blaming through it is noise — this entry redirects
blame to the actual content author.

Local clones need a one-time:
    git config blame.ignoreRevsFile .git-blame-ignore-revs
GitHub picks it up automatically.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: tablackburn

.git-blame-ignore-revs

@@ -0,0 +1,9 @@
+# Revisions to ignore when running git blame.
+#
+# Configure your local clone with:
+#   git config blame.ignoreRevsFile .git-blame-ignore-revs
+#
+# GitHub's web UI uses this file automatically.
+
+# chore: renormalize line endings to LF (210 files, content unchanged)
+4096d36b6b9a24f6bd23029573337449ea1b8e33