Add CITATION.cff and a Citation section

CITATION.cff

@@ -0,0 +1,51 @@
+# Copyright © 2021-present Arcade Data Ltd (info@arcadedata.com)
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+
+#      http://www.apache.org/licenses/LICENSE-2.0
+
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+#  SPDX-FileCopyrightText: 2021-present Arcade Data Ltd (info@arcadedata.com)
+#  SPDX-License-Identifier: Apache-2.0
+
+# No `version` or `date-released` on purpose: this repository has made no release yet (the first is 26.11.1),
+# and the wheel version comes from the engine jar at build time, so a number written here would go stale.
+# Add both when a release is cut.
+cff-version: 1.2.0
+title: ArcadeDB Python
+message: If you use this software, please cite it using the metadata from this file.
+type: software
+authors:
+  - name: Arcade Data Ltd
+    alias: ArcadeData
+    website: "https://arcadedb.com"
+  - given-names: Taewoon
+    family-names: Kim
+    email: taewoon@humem.ai
+    orcid: "https://orcid.org/0000-0003-2892-0194"
+    affiliation: HumemAI
+contact:
+  - given-names: Taewoon
+    family-names: Kim
+    email: taewoon@humem.ai
+repository-code: "https://github.com/ArcadeData/arcadedb-python"
+url: "https://arcadedb.com"
+abstract: Python bindings for ArcadeDB, the multi-model database (graph, document, key/value, vector and time series, queried with SQL or openCypher). The engine runs inside the Python process through JPype, and each wheel bundles its own Java runtime.
+license: Apache-2.0
+keywords:
+  - ArcadeDB
+  - Python
+  - Bindings
+  - Embedded
+  - Multi-Model
+  - Graph
+  - Vector
+  - SQL
+  - openCypher

README.md

@@ -88,6 +88,11 @@ Open an [issue](https://github.com/ArcadeData/arcadedb-python/issues) or a pull
 
 It moved here from `bindings/python` in [ArcadeData/arcadedb](https://github.com/ArcadeData/arcadedb) at `ee04bd202abce0183c6263a3c4d8a61a4d526960`, with its git history. Issue numbers in older commit messages refer to that repository. [humemai/arcadedb-embedded-python](https://github.com/humemai/arcadedb-embedded-python) is the fork where the bindings kept developing (runtime fixes, JRE trim, native build, benchmarks). Its benchmark tooling stays there. <!-- allow-old-name -->
 
+## Citation
+
+If you use these bindings in published work, cite them with the metadata in [`CITATION.cff`](https://github.com/ArcadeData/arcadedb-python/blob/main/CITATION.cff); GitHub shows it as "Cite this repository".
+There is no DOI for this repository yet.
+
 ## License
 
 Apache License 2.0, like ArcadeDB. See [`LICENSE`](https://github.com/ArcadeData/arcadedb-python/blob/main/LICENSE).