feat(cli): 'tht session set-schema-linking' (file/stdin, validated)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

harness/tht/cli/session_cmd.py

@@ -110,6 +110,37 @@ def set_question_cmd(
     typer.secho(f"OK: question.md aggiornato ({path}).", fg=typer.colors.GREEN)
 
 
+@session_app.command("set-schema-linking")
+def set_schema_linking_cmd(
+    session_id: str = typer.Argument(...),
+    file: str = typer.Option(
+        ..., "--file", "-f",
+        help="Path al JSON dello schema-linking, oppure '-' per leggere da stdin."),
+    config: Path = CONFIG_OPT,
+) -> None:
+    """Valida (modello SchemaLinking) e scrive schema_linking.json deterministicamente."""
+    import sys
+
+    from pydantic import ValidationError
+
+    from tht.session.store import set_schema_linking
+
+    cfg = _load_config_or_exit(config)
+    load_session_or_exit(cfg, session_id)
+    raw = sys.stdin.read() if file == "-" else Path(file).read_text()
+    try:
+        data = json.loads(raw)
+    except json.JSONDecodeError as e:
+        typer.secho(f"ERRORE: JSON non valido: {e}", fg=typer.colors.RED, err=True)
+        raise typer.Exit(code=5)
+    try:
+        path = set_schema_linking(session_id, data, cfg.paths.sessions)
+    except ValidationError as e:
+        typer.secho(f"ERRORE: schema_linking non valido:\n{e}", fg=typer.colors.RED, err=True)
+        raise typer.Exit(code=5)
+    typer.secho(f"OK: schema_linking.json aggiornato ({path}).", fg=typer.colors.GREEN)
+
+
 @session_app.command("show")
 def show_cmd(
     session_id: str = typer.Argument(...),