Wire relationship directionality and dualpath controls propagation

Symmetric relationship types (isdirectional flag, migration 7d19) show
one entry per peer on the relationships card - a Dualpath pair no
longer lists its partner twice - and directional types read naturally
instead of Outgoing/Incoming. Deleting a collapsed entry removes every
underlying direction row.

Propagation is now real (migration 7d20): relationship types declare
propagation-through pairs in relationshiptypepropagations (M:N,
replacing the never-consumed single column); creating a controls link
on either bay of a Dualpath pair auto-creates it on the partner,
mirrored across both endpoints because live data stores controls as
bay -> PC. flask relationships propagate backfills existing data (29
rows fanned out on the WJ dataset, idempotent).

This also completes the tree that commit 1d21bf0 accidentally split
(core/models/__init__ imported RelationshipTypePropagation ahead of the
file that defines it), returning CI to green.

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

CHANGELOG.md

@@ -12,6 +12,16 @@ ADR-007 and ADR-002.
 
 ### Added
 
+- Relationship propagation, wired and data-driven: relationship types
+  declare propagation-through pairs (relationshiptypepropagations M:N,
+  replacing the never-consumed single column); creating a controls link on
+  one Dualpath bay auto-creates it on the partner bay, and
+  `flask relationships propagate` backfills existing data.
+- Employee photos, mode-aware: self-hosted directory employees support
+  upload/replace/delete (admin), served publicly for kiosk cards; external
+  directory mode passes the HR-supplied picture URL through read-only. One
+  resolver feeds the shopfloor recognition/recert cards and the employee
+  detail hero in either mode.
 - Vendor-model photo management. New admin-gated core endpoints
   `POST /api/models/<modelid>/image` (multipart `file`, png/jpg/jpeg/gif/webp/svg,
   one image per model, replace semantics) and
@@ -66,6 +76,9 @@ ADR-007 and ADR-002.
 
 ### Fixed
 
+- Following a relationship link between two assets of the same type now loads
+  the destination page instead of stale content (router-view keyed on path;
+  query-only URL changes still avoid a remount).
 - Asset relationships card no longer lists a symmetric peer twice. Relationship
   types gain `relationshiptypes.isdirectional` (migration
   `7d19_relationshiptype_directional`; seeded false for the connection-like