ACS-12413 : enable deferred pre-commit hooks and normalize repo (#1333)

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

.gitattributes

@@ -0,0 +1,21 @@
+# Normalize line endings: Git stores text as LF and checks out LF on every platform.
+# Enforcing eol=lf keeps the working tree consistent and makes tools that honour
+# git attributes (e.g. Spotless) emit LF, so the mixed-line-ending hook stays stable.
+* text=auto eol=lf
+
+# Windows batch files must stay CRLF.
+*.bat   text eol=crlf
+*.cmd   text eol=crlf
+
+# Byte-exact test fixtures: never normalize (mirrors the pre-commit excludes).
+**/src/test/resources/** -text
+
+# Binary assets / test fixtures — never normalize or diff as text.
+*.key   binary
+*.z     binary
+*.gz    binary
+*.jar   binary
+*.vsd   binary
+*.vdx   binary
+*.xbm   binary
+*.xpm   binary