Closes out the [Unreleased] section with the features that have been
implemented since 0.2.0:

- Workspace split: anno-core, anno, anno-eval, anno-cli, anno-metrics, anno-lattix
- PatternNER → RegexNER rename
- GLiNER2 multi-task backend (ONNX + Candle)
- Coreference: T5Coref scaffold, GraphCoref iterative refinement, MentionRankingCoref
- Graph RAG: GraphDocument with Neo4j Cypher + NetworkX/JSON-LD export
- Grounded entity representation: Signal → Track → Identity (GroundedDocument)
- Task evaluation system with LinUCB routing and regression detection
- Discourse analysis: centering theory, abstract anaphora, events
- anno-metrics and anno-lattix crates

T5Coref::resolve() uses a rule-based heuristic fallback pending full
encoder/decoder ONNX wiring. All other features are functional.