Add read-only analyze command

README.md

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+# Serato Doctor
+
+Serato Doctor is a read-only-first toolkit for inspecting and eventually repairing
+DJ libraries. Serato is the first supported engine.
+
+## Analyze a Library
+
+```shell
+serato-doctor analyze \
+  --serato ~/Music/_Serato_ \
+  --music ~/Music/Jukebox
+```
+
+Analysis prints a transparent reference-integrity score plus broken references,
+duplicate filenames, unused tracks, and suggested filename matches. It does not
+modify the library or create report files.
+
+If crates contain an older library root, supply it explicitly:
+
+```shell
+serato-doctor analyze --reference-root /Users/old-user/OneDrive/Jukebox
+```
+
+## Generate Detailed Reports
+
+Running without a command preserves the original scanner behavior and writes CSV
+and text reports:
+
+```shell
+serato-doctor --serato ~/Music/_Serato_ --music ~/Music/Jukebox
+```
+
+Use `--verbose` for progress on standard error or `--log-file PATH` for an
+aggregate diagnostic log.
+
+Serato Doctor never repairs files without an explicit future repair workflow,
+preview, backup, and rollback path.