feat: reggaeton production system with intelligent sample selection and FLP generation

.gitattributes

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+# Normalize line endings to LF in the repo, checkout as-is on Windows
+* text=auto eol=lf
+
+# Python
+*.py text eol=lf
+
+# Batch files need CRLF on Windows
+*.bat text eol=crlf
+
+# Binaries
+*.flp binary
+*.wav binary
+*.mp3 binary
+*.bin binary
+*.npy binary
+*.faiss binary
+*.pkl binary