feat: complete catalog-driven preprocessing

harness/tht/cli/schema_cmd.py

@@ -560,22 +560,14 @@ def render_cmd(
     ),
     output: Path = typer.Option(None, "--output", "-o", help="File di output (default stdout)."),
 ) -> None:
-    """Serializza mschema (physical + annotations) nel formato richiesto."""
+    """Serialize the current PostgreSQL Catalog projection."""
     import json
 
     from tht.mschema.render import to_markdown, to_mschema_text, to_schema_dict
 
     cfg = _load_config_or_exit(config)
-    phys_file = physical_path(cfg)
-    if not phys_file.exists():
-        typer.secho(
-            f"ERRORE: {phys_file} non trovato. Esegui prima `tht schema introspect`.",
-            fg=typer.colors.RED,
-            err=True,
-        )
-        raise typer.Exit(code=1)
     try:
-        context = load_schema_context(cfg, physical_file=phys_file)
+        context = load_schema_context(cfg)
     except SchemaContextError as exc:
         typer.secho(f"ERRORE: {exc}", fg=typer.colors.RED, err=True)
         raise typer.Exit(code=1) from None
@@ -625,17 +617,12 @@ def columns_cmd(
     """Elenca nome/descrizione/tipo/pk delle colonne di una tabella dal catalogo."""
     import json as _json
 
-    from tht.mschema.models import PhysicalSchema
-
     cfg = _load_config_or_exit(config)
-    phys_file = physical_path(cfg)
-    if not phys_file.exists():
-        typer.secho(
-            f"ERRORE: {phys_file} non trovato. Esegui prima `tht schema introspect`.",
-            fg=typer.colors.RED, err=True,
-        )
+    try:
+        physical = load_schema_context(cfg).physical
+    except SchemaContextError as exc:
+        typer.secho(f"ERRORE: {exc}", fg=typer.colors.RED, err=True)
         raise typer.Exit(code=1)
-    physical = PhysicalSchema.from_yaml(phys_file)
 
     def _payload(name, tbl):
         return {