feat(evidence): prepare curated evidence incrementally

harness/tht/evidence/__init__.py

@@ -3,10 +3,17 @@
 from tht.evidence.acquisition import acquire, discover
 from tht.evidence.authoring import (
     EvidenceManifest,
+    EvidencePreparationError,
+    EvidencePreparationReport,
+    EvidenceRestructurer,
+    PiEvidenceRestructurer,
+    RestructureCandidate,
+    RestructureRequest,
     ValidationFinding,
     ValidationReport,
     dump_manifest,
     load_manifest,
+    prepare_workspace_evidence,
     validate_workspace_evidence,
 )
 from tht.evidence.canonical import (
@@ -45,9 +52,15 @@ __all__ = [
     "CuratedEvidence",
     "EvidenceEmbedder",
     "EvidenceManifest",
+    "EvidencePreparationError",
+    "EvidencePreparationReport",
+    "EvidenceRestructurer",
     "EvidenceSource",
     "EvidenceSourceError",
     "EvidenceSourceErrorCategory",
+    "PiEvidenceRestructurer",
+    "RestructureCandidate",
+    "RestructureRequest",
     "SourceObject",
     "ValidationFinding",
     "ValidationReport",
@@ -64,6 +77,7 @@ __all__ = [
     "load_manifest",
     "normalize_aware_datetime",
     "parse_curated_markdown",
+    "prepare_workspace_evidence",
     "project_session",
     "resolve_citation",
     "validate_corpus_workspace",