Fix : Missing Catalog Number Placeholder for Inherited Values in Child COs

[Gitesh307]

Fixes #7537

This PR fixes Catalog Number Inheritance for Collection Object Groups so that new child COs no longer get auto-numbered when inheritance is enabled. The sibling API now resolves the primary catalog number using either a child_co_id or a cog_id, letting brand-new children (no id yet) inherit immediately. The COG “Add CO” dialog and catalog-number field component request the inherited value upfront and write it into the actual field value (not just a placeholder), while still allowing the user to edit it.

Checklist

• Self-review the PR after opening it to make sure the changes look good and
  self-explanatory (or properly documented)
• Add relevant issue to release milestone

Testing instructions

• Verify in the UI that adding a child CO to a COG with

"catalogNumberInheritance": {
   "behavior": {
     "inheritance": true
   }}

now shows the primary CO’s catalog number as a grayout placeholder that can be manually edited.

[grantfitzsimmons]

Research, unrelated to PR:

I checked out 68ffde7 (#6721), which was an old commit right after I tested that inheritance is working ("Verify the catalog number from the parent CO appears grayed out in the Component’s catalog number field")

In main:

In 68ffde7 (#6721):

I tried quite a number of times to get inheritance to work on both, using the following as my CollectionPreferences resource:

{"catalogNumberInheritance": {"behavior": {"inheritance": true}}}

Neither work. Not sure where it broke before. Will test this PR soon.

[emenslin]

• Verify in the UI that adding a child CO to a COG with

Looks good

[Iwantexpresso]

• Verify in the UI that adding a child CO to a COG with

"catalogNumberInheritance": {
   "behavior": {
     "inheritance": true
   }}

now shows the primary CO’s catalog number as a grayout placeholder that can be manually edited.

After adding the inheritance clause to the json file in app resources:

The new children of added to the COG are not properly inheriting the number form the primary number nor its being displayed as greyed out. and the auto numbering is still taking priority