feat: complete catalog-driven preprocessing

harness/tht/cli/sql_cmd.py

@@ -4,7 +4,7 @@ from pathlib import Path
 import typer
 
 from tht.cli.config_cmd import CONFIG_OPT
-from tht.cli.schema_cmd import _load_config_or_exit, physical_path
+from tht.cli.schema_cmd import _load_config_or_exit
 
 sql_app = typer.Typer(help="Validazione ed esecuzione controllata di SQL (read-only)")
 
@@ -17,16 +17,16 @@ def _read_sql(file: Path) -> str:
 
 
 def _load_physical_or_exit(cfg):
-    from tht.mschema.models import PhysicalSchema
+    from tht.mschema.context import SchemaContextError, load_schema_context
 
-    phys_file = physical_path(cfg)
-    if not phys_file.exists():
+    try:
+        return load_schema_context(cfg).physical
+    except SchemaContextError:
         typer.secho(
-            f"ERRORE: {phys_file} non trovato. Esegui prima `tht schema introspect`.",
+            "ERRORE: Catalog Metadata Snapshot non disponibile. Esegui il preprocessing.",
             fg=typer.colors.RED, err=True,
         )
         raise typer.Exit(code=1)
-    return PhysicalSchema.from_yaml(phys_file)
 
 
 def require_action(cfg, action: str) -> None: