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docker/mysql/init/README.md

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+# MySQL init directory
+
+This directory is kept as a legacy hook for file-based MySQL initialization.
+
+Current production path in this repository is not file-based import.
+The live Docker flow uses the `db-bootstrap` service in `docker-compose.yaml` to stream data from the external source DB into the internal `db` container.
+
+Use this directory only if you intentionally switch back to `docker-entrypoint-initdb.d` style initialization.
+
+If you do that, typical naming would be:
+
+- `01_schema.sql`
+- `02_seed.sql`
+- or a single `01_itam_dump.sql`
+
+Remember that files in this directory are executed automatically by the MySQL container only on the first initialization of the data volume.