feat(vector): server-side kinds filter for search_similar (legacy fallback) + graceful solved-search degrade

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

harness/tht/cli/memory_cmd.py

@@ -516,12 +516,26 @@ def solved_search_cmd(
 
     from tht.cli.vector_cmd import make_embedder, open_searcher
     from tht.solved import SOLVED_KIND
+    from tht.vectorstore.embeddings import EmbeddingsError
+    from tht.vectorstore.rest_client import VectorRestError
 
     cfg = _load_config_or_exit(config)
     require_vector_cfg(cfg)
-    searcher = open_searcher(cfg)
-    embedder = make_embedder(cfg.embeddings)
-    hits = searcher.search(embedder.embed_query(question), top_n=top, kinds=[SOLVED_KIND])
+    # Degrado gentile: SKILL.md prescrive solved-search in F4/F6/F7 di ogni sessione,
+    # quindi vectordb/Ollama irraggiungibili non devono produrre un traceback grezzo
+    # nel transcript: avviso di una riga su stderr, stdout puro ([] in --json), exit 0.
+    try:
+        searcher = open_searcher(cfg)
+        embedder = make_embedder(cfg.embeddings)
+        hits = searcher.search(embedder.embed_query(question), top_n=top, kinds=[SOLVED_KIND])
+    except (VectorRestError, EmbeddingsError, OperationalError) as e:
+        typer.secho(
+            f"ATTENZIONE: exemplar non disponibili ({e}). Prosegui senza.",
+            fg=typer.colors.YELLOW, err=True,
+        )
+        if json_out:
+            typer.echo("[]")
+        return
     results = [
         {
             "session_id": h.metadata.get("session_id", h.ref),