chore(vault): rebuild git infra (gitignore/attributes/mailmap/hooks)

.gitattributes

@@ -0,0 +1,45 @@
+# Normalize line endings and mark binaries for cross-platform consistency
+
+# Default: text with LF (cross-platform canonical)
+* text=auto eol=lf
+
+# Windows scripts keep CRLF
+*.ps1   text eol=crlf
+*.cmd   text eol=crlf
+*.bat   text eol=crlf
+
+# Shell/Unix scripts use LF
+*.sh    text eol=lf
+
+# Obsidian text artifacts
+*.md    text eol=lf
+*.base  text eol=lf
+*.canvas binary
+*.json  text eol=lf
+*.yaml  text eol=lf
+*.yml   text eol=lf
+
+# Binary assets (no diff noise, no line-ending conversion)
+*.png   binary
+*.jpg   binary
+*.jpeg  binary
+*.gif   binary
+*.webp  binary
+*.ico   binary
+*.svg   binary
+*.pdf   binary
+*.epub  binary
+*.docx  binary
+*.pptx  binary
+*.xlsx  binary
+*.mp4   binary
+*.mov   binary
+*.webm  binary
+*.mp3   binary
+*.wav   binary
+*.zip   binary
+*.gz    binary
+*.7z    binary
+*.tar   binary
+*.exe   binary
+*.dll   binary