Update fixture for part model to match MPTT requirements

InvenTree/part/fixtures/part.yaml

@@ -7,6 +7,10 @@
     description: 'M2x4 low profile head screw'
     category: 8
     link: www.acme.com/parts/m2x4lphs
+    tree_id: 0
+    level: 0
+    lft: 0
+    rght: 0
 
 - model: part.part
   pk: 2
@@ -14,6 +18,10 @@
     name: 'M3x12 SHCS'
     description: 'M3x12 socket head cap screw'
     category: 8
+    tree_id: 0
+    level: 0
+    lft: 0
+    rght: 0
 
 # Create some resistors
 
@@ -23,6 +31,11 @@
     name: 'R_2K2_0805'
     description: '2.2kOhm resistor in 0805 package'
     category: 2
+    tree_id: 0
+    level: 0
+    lft: 0
+    rght: 0
+
 
 - model: part.part
   fields:
@@ -30,6 +43,10 @@
     description: '4.7kOhm resistor in 0603 package'
     category: 2
     default_location: 2  # Home/Bathroom
+    tree_id: 0
+    level: 0
+    lft: 0
+    rght: 0
 
 # Create some capacitors
 - model: part.part
@@ -37,6 +54,10 @@
     name: 'C_22N_0805'
     description: '22nF capacitor in 0805 package'
     category: 3
+    tree_id: 0
+    level: 0
+    lft: 0
+    rght: 0
 
 - model: part.part
   pk: 25
@@ -45,6 +66,10 @@
     description: 'A watchamacallit'
     category: 7
     trackable: true
+    tree_id: 0
+    level: 0
+    lft: 0
+    rght: 0
 
 - model: part.part
   pk: 50
@@ -52,6 +77,10 @@
     name: 'Orphan'
     description: 'A part without a category'
     category: null
+    tree_id: 0
+    level: 0
+    lft: 0
+    rght: 0
 
 # A part that can be made from other parts
 - model: part.part
@@ -64,4 +93,8 @@
     category: 7
     active: False
     IPN: BOB
-    revision: A2
+    revision: A2
+    tree_id: 0
+    level: 0
+    lft: 0
+    rght: 0