refactor(evidence): remove legacy Python layout (#31)

harness/tests/test_corpus_pipeline.py

@@ -2,11 +2,11 @@ from datetime import UTC, datetime, timedelta
 
 import pytest
 
-from tht.corpus.chunk import ChunkPolicy
-from tht.corpus.pipeline import CorpusPipeline, PipelineError, PipelineResult
-from tht.corpus.store import CorpusStore
-from tht.corpus.models import CanonicalChunk, CanonicalDocument, CorpusManifest
-from tht.ports.evidence import AcquiredDocument, SourceObject
+from tht.evidence.corpus.chunk import ChunkPolicy
+from tht.evidence.corpus.pipeline import CorpusPipeline, PipelineError, PipelineResult
+from tht.evidence.corpus.store import CorpusStore
+from tht.evidence.corpus.models import CanonicalChunk, CanonicalDocument, CorpusManifest
+from tht.evidence.contracts import AcquiredDocument, SourceObject
 from tht.ports.vector import VectorCapabilities, VectorHealth
 
 
@@ -273,7 +273,7 @@ def test_gc_preserves_vector_dependencies_of_retained_manifests(tmp_path):
 
 def test_active_searcher_without_active_fails_closed_for_evidence(tmp_path):
     from types import SimpleNamespace
-    from tht.search.evidence import active_searcher
+    from tht.evidence.search import active_searcher
 
     class Delegate:
         def search(self, embedding, top_n=10, kinds=None, metadata_filter=None):
@@ -287,7 +287,7 @@ def test_active_searcher_without_active_fails_closed_for_evidence(tmp_path):
 
 def test_active_searcher_splits_default_and_mixed_kinds_before_global_limit(tmp_path):
     from types import SimpleNamespace
-    from tht.search.evidence import ActiveEvidenceSearcher
+    from tht.evidence.search import ActiveEvidenceSearcher
 
     store = CorpusStore(tmp_path / "corpus")
     generation = store.stage(
@@ -319,7 +319,7 @@ def test_active_searcher_splits_default_and_mixed_kinds_before_global_limit(tmp_
 def test_active_evidence_query_holds_lock_against_publish(tmp_path):
     import threading
     from types import SimpleNamespace
-    from tht.search.evidence import ActiveEvidenceSearcher
+    from tht.evidence.search import ActiveEvidenceSearcher
 
     first_pipeline = pipeline(tmp_path, Source([(item("one", "a"), "old")]), vectors=Vectors())
     first_pipeline.run()
@@ -450,7 +450,7 @@ def test_gc_rejects_workspace_mismatch_without_deleting(tmp_path):
 
 @pytest.mark.parametrize("kinds", [None, ["evidence", "memory"], ["memory"]])
 def test_active_search_rejects_workspace_mismatch_before_delegate(tmp_path, kinds):
-    from tht.search.evidence import ActiveEvidenceSearcher, CorpusWorkspaceMismatchError
+    from tht.evidence.search import ActiveEvidenceSearcher, CorpusWorkspaceMismatchError
 
     vectors = Vectors()
     owner = pipeline(tmp_path, Source([(item("one", "a"), "stable")]), vectors=vectors)