fix(preprocess): restrict DWH root claims to writers

harness/tht/cli/preprocess_cmd.py

@@ -19,15 +19,14 @@ def run_dwh_from_config(
     config: Path, *, steps: tuple[str, ...], resume: str | None = None,
 ):
     from tht.cli.lsh_cmd import build_lsh_artifacts
-    from tht.cli.schema_cmd import _load_config_or_exit, physical_path, refresh_catalog
+    from tht.cli.schema_cmd import _load_config_or_exit, refresh_catalog
     from tht.jobs.dwh_pipeline import (
-        DwhPreprocessPipeline, active_generation_dir, config_dwh_binding,
+        DwhPreprocessPipeline, config_dwh_binding,
     )
 
     cfg = _load_config_or_exit(config)
     binding = config_dwh_binding(cfg)
     workspace_root = cfg.paths.artifacts.parent
-    active = active_generation_dir(workspace_root)
     lsh_names = (
         f"{cfg.database.db_schema}_lsh.pkl",
         f"{cfg.database.db_schema}_minhashes.pkl",
@@ -43,8 +42,8 @@ def run_dwh_from_config(
             cfg, physical_file=physical, output_dir=output
         ),
         lsh_filenames=lsh_names,
-        current_physical=physical_path(cfg),
-        current_lsh_dir=active if active is not None else cfg.paths.indexes / "lsh",
+        current_physical=cfg.paths.artifacts / "mschema" / "physical.yaml",
+        current_lsh_dir=cfg.paths.indexes / "lsh",
     )
     return pipeline.run(steps, resume_run_id=resume)