refactor(evidence): migrate runtime consumption (#29)

harness/tht/cli/search_cmd.py

@@ -54,18 +54,16 @@ def search_cmd(
     from rich.table import Table
 
     from tht.cli.vector_cmd import make_embedder, open_searcher, require_vector_cfg
+    from tht.evidence import active_searcher, validate_corpus_workspace
     from tht.lshindex import LshIndexError, load_index, query_index
     from tht.search import combined_search
 
     cfg = _load_config_or_exit(config)
-    from tht.search.evidence import validate_corpus_workspace
 
     workspace_id = workspace_id_for_config(cfg, config)
     validate_corpus_workspace(cfg, workspace_id)
     dwh_snapshot = _leased_dwh_snapshot(cfg, ctx)
     require_vector_cfg(cfg)
-    from tht.search.evidence import active_searcher
-
     runtime_searcher = active_searcher(
         cfg, open_searcher(cfg),
         workspace_id=workspace_id,
@@ -255,13 +253,17 @@ def pack_cmd(
     from sqlalchemy.exc import OperationalError
 
     from tht.cli.vector_cmd import make_embedder, open_searcher, require_vector_cfg
+    from tht.evidence import (
+        active_searcher,
+        build_retrieval_entries,
+        validate_corpus_workspace,
+    )
     from tht.ports.vector import VectorReadUnavailable, VectorStoreError
     from tht.search import combined_search, schema_tables
     from tht.memory import SOLVED_KIND
     from tht.vectorstore.embeddings import EmbeddingsError
 
     cfg = _load_config_or_exit(config)
-    from tht.search.evidence import validate_corpus_workspace
 
     workspace_id = workspace_id_for_config(cfg, config)
     validate_corpus_workspace(cfg, workspace_id)
@@ -277,8 +279,6 @@ def pack_cmd(
     vec = None
     searcher = embedder = None
     try:
-        from tht.search.evidence import active_searcher
-
         searcher = active_searcher(
             cfg, open_searcher(cfg),
             workspace_id=workspace_id,
@@ -314,11 +314,7 @@ def pack_cmd(
                 top=PACK_EVIDENCE_TOP, rrf_k=cfg.search.rrf_k,
                 kinds=KIND_MAP["evidence"], query_vec=vec,
             )
-            evidence = [
-                {"title": r.label, "status": r.status,
-                 "excerpt": r.content[:PACK_EXCERPT_CHARS]}
-                for r in ev
-            ]
+            evidence = build_retrieval_entries(ev, excerpt_chars=PACK_EXCERPT_CHARS)
         except degrade as e:
             warnings.append(f"ricerca evidence fallita ({e})")
         try: