Add retained evidence boundary posture

CHANGELOG.md

@@ -7,6 +7,10 @@
 
 ### Added
 
+- `warp-core` now exposes `RetainedEvidenceBoundaryPosture` with boundary
+  layer, origin, proof strength, access, completeness, and obstruction axes so
+  retained evidence refs can be projected without conflating citation, reveal
+  permission, redaction, unsupported evidence kinds, or missing retention.
 - `warp-core` now exposes a recovered WAL evidence segment catalog derived from
   `RecoveryScanReport`, with a non-authoritative live cache in
   `TrustedRuntimeWal` that marks cache-update failures as rebuild posture

crates/warp-core/src/lib.rs

@@ -279,7 +279,10 @@ pub use playback::{
     CursorId, CursorRole, PlaybackCursor, PlaybackMode, SeekError, SeekThen, StepResult,
 };
 pub use retained_evidence::{
-    RetainedEvidenceCoordinate, RetainedEvidencePosture, RetainedEvidenceRef, RetainedEvidenceRole,
+    RetainedEvidenceAccess, RetainedEvidenceBoundaryPosture, RetainedEvidenceCompleteness,
+    RetainedEvidenceCoordinate, RetainedEvidenceLayer, RetainedEvidenceOrigin,
+    RetainedEvidencePosture, RetainedEvidenceProofStrength, RetainedEvidenceRef,
+    RetainedEvidenceRole,
 };
 // --- Sealed membership capability types ---
 pub use sealed_membership::{