Add Release information.

VERSION.md

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+## VERSION INFORMATION
+
+This is release v0.50.
+
+It has many fundamental changes under the hood:
+
+- [DuckDB] has been replaced by [Clickhouse] for all calculations.
+- `process-data` is now completely *async* due to many dependencies including the `klickhouse` client.
+- `acutectl` is now *async* except for the `Engine` itself which still runs in a sync environment.
+- There are many more Python scripts in the `scripts` directory.
+- Most of the import and conversion processes make use of the [bdt] and [qsv] utilities.
+- `fetiched` is currently not working and will be updated in the near-future.
+
+Main dependencies:
+
+- datafusion v41
+- arrow/parquet v52
+
+Current crates versions:
+
+- acutectl/0.23.0
+- process-data/0.4.0+clickhouse
+- fetiche-engine/0.23.0
+- fetiche-formats/0.17.1
+- fetiche-sources/0.16.0
+- fetiche-common/0.4.0
+- fetiche-macros/0.3.0