Phase 7A: wire ADR-001 asset position contract surface

Lock the position-resolution columns from ADR-001 in code so
resolve_asset_position's relationship walk activates.

Schema
- Asset.mapleft -> Asset.mapx, Asset.maptop -> Asset.mapy
- Location.mapx / Location.mapy added (fallback for priority 3 of the
  ADR-001 resolution chain)
- AssetRelationship.label (free-text nuance per ADR-001)
- AssetRelationship.inheritsposition (bool, server_default true, controls
  whether the resolved-position walk follows the edge)
- RelationshipType.propagatesthroughid (self-FK; sibling-propagation rail)

Seeds
- Three canonical ADR-001 relationship types created idempotently:
  partof, controls, connectedto
- controls.propagatesthroughid wired to partof (partof + connectedto stay
  null per ADR-001 table). Both via Alembic migration AND CLI seed command
  so a fresh test fixture and a sister-site deploy both end up correct.
- Legacy connection types (Serial Cable, Direct Ethernet, USB, WiFi,
  Dualpath) retained for backward compat with pre-1.0 relationship rows.

Resolver
- shopdb.api.resolve_asset_position now walks inheritsposition=true edges
  of type partof (then controls), recursively, depth-capped at 3 with
  visited-set cycle protection. Inactive edges + non-inheritable types
  are skipped. Falls through to the existing location fallback when the
  walk yields nothing.

Tests
- 11 new test_api_namespace cases cover: partof walk, controls-after-
  partof ordering, connectedto skipped, inheritsposition=false skipped,
  recursion, cycle break, depth-3 cap, self-beats-related, related-beats-
  location, inactive-edge skip.
- 111 tests pass. Naming/style check green.

Migration
- migrations/versions/7a01_adr001_position_contract.py:
  - alter_column renames on assets (no data loss)
  - add_column on locations + relationshiptypes + assetrelationships
  - idempotent seed of three ADR types + propagation FK wire-up
  - downgrade reverses + best-effort deletion of seeded types that have
    no FK refs

Backend rename (mapleft/maptop -> mapx/mapy)
- shopdb/core/api/assets.py
- plugins/{computers,equipment,network,printers}/api/...
- scripts/migration/migrate_assets.py
- Legacy Machine model + machines API + import_from_mysql.py UNCHANGED
  (per ADR-001 Machine retires; not part of the asset contract)

Frontend rename
- frontend/src/components/ShopFloorMap.vue
- frontend/src/views/{MapEditor.vue, pcs/{PCDetail,PCForm}.vue,
  printers/{PrinterDetail,PrinterForm}.vue,
  machines/{MachineDetail,MachineForm}.vue,
  network/NetworkDeviceForm.vue}
- Form field labels + v-model bindings + computed flags switched in
  lockstep with the backend.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

shopdb/cli/__init__.py

@@ -97,7 +97,9 @@ def seed_reference_data():
             os_obj = OperatingSystem(**os_data)
             db.session.add(os_obj)
 
-    # Connection types (how PC connects to equipment)
+    # Connection types (pre-1.0 legacy; kept for backward compat with
+    # existing relationship rows. New ADR-001 code reasons about the three
+    # canonical types below via free-text label.)
     connection_types = [
         {'relationshiptype': 'Serial Cable', 'description': 'RS-232 or similar serial connection'},
         {'relationshiptype': 'Direct Ethernet', 'description': 'Direct network cable (airgapped)'},
@@ -112,6 +114,27 @@ def seed_reference_data():
             ct = RelationshipType(**ct_data)
             db.session.add(ct)
 
+    # ADR-001 canonical relationship types. Created first without propagation
+    # FKs, then patched with propagatesthroughid since `controls` points at
+    # `partof` (same table). All three are idempotent.
+    adr_types = [
+        {'relationshiptype': 'partof', 'description': 'Composition / sub-assembly (ADR-001)'},
+        {'relationshiptype': 'controls', 'description': 'Operational authority over another asset (ADR-001)'},
+        {'relationshiptype': 'connectedto', 'description': 'Network or data link without authority (ADR-001)'},
+    ]
+    for at in adr_types:
+        existing = RelationshipType.query.filter_by(relationshiptype=at['relationshiptype']).first()
+        if not existing:
+            db.session.add(RelationshipType(**at))
+    db.session.flush()
+
+    # Wire `controls` -> `partof` propagation rail. partof + connectedto stay
+    # null (no propagation).
+    partof = RelationshipType.query.filter_by(relationshiptype='partof').first()
+    controls = RelationshipType.query.filter_by(relationshiptype='controls').first()
+    if partof and controls and controls.propagatesthroughid != partof.relationshiptypeid:
+        controls.propagatesthroughid = partof.relationshiptypeid
+
     db.session.commit()
     click.echo(click.style("Reference data seeded.", fg='green'))