Consolidate documentation ownership

docs/roadmap/implementation.md

@@ -1,25 +0,0 @@
-# Workspace Implementation Status
-
-The workspace implementation described by this roadmap has landed. Current
-behavior is documented in the canonical current-behavior docs:
-
-- [Configuration](../config.md)
-- [CLI Reference](../cli.md)
-- [Operations](../operations.md)
-- [Diagnostics Internals](../internal/diagnostics.md)
-- [Pipeline Internals](../internal/pipeline.md)
-
-Implemented behavior includes:
-
-- `workspace.directory` as the root for Notarius-owned local state;
-- workspace diagnostics under `<workspace.directory>/diagnostics/<run-id>/`;
-- compatibility for legacy `diagnostics.work_dir`, `diagnostics.retention`,
-  `NOTARIUS_WORK_DIR`, and `NOTARIUS_DIAGNOSTICS_RETENTION`;
-- checkpoint writes under `<workspace.directory>/checkpoints/` when resume
-  checkpointing is enabled;
-- explicit checkpoint reuse through `notarius run --resume`;
-- debug artifacts under `<workspace.directory>/debug/<run-id>/` when debug
-  output is enabled;
-- independent resume and debug settings.
-
-Deferred workspace ideas remain in [Workspace Roadmap](workspace.md).