isAuditsDisabled: disabled at org level for type is overruling enabled at site level for type

**Description**
isAuditsDisabled: disabled at org level for type is overruling enabled at site level for type

**To Reproduce**
Steps to reproduce the behavior:
Take an organization with config:
```
{
"config": {
"audits": {
"auditsDisabled": false,
"auditTypeConfigs": {
"organic-keywords": {
"disabled": true
},
"broken-backlinks": {
"disabled": true
},
"organic-traffic": {
"disabled": true
}
}
}
}
}
```

Take a site from the organization with auditConfig:
```
"auditConfig": {
"auditsDisabled": false,
"auditTypeConfigs": {
"organic-keywords": {
"disabled": true
},
"broken-backlinks": {
"disabled": false
},
"organic-traffic": {
"disabled": true
}
}
}
```

isAuditsDisabled(site, organization, 'broken-backlinks') returns true.

**Expected behavior**
Given an organization with config:
```
{
"config": {
"audits": {
"auditsDisabled": false,
"auditTypeConfigs": {
"organic-keywords": {
"disabled": true
},
"broken-backlinks": {
"disabled": true
},
"organic-traffic": {
"disabled": true
}
}
}
}
}
```
And a site from the organization with auditConfig:
```
"auditConfig": {
"auditsDisabled": false,
"auditTypeConfigs": {
"organic-keywords": {
"disabled": true
},
"broken-backlinks": {
"disabled": false
},
"organic-traffic": {
"disabled": true
}
}
}
```

isAuditsDisabled(site, organization, 'broken-backlinks') should return false.

**Additional context**
https://github.com/adobe/spacecat-shared/blob/main/packages/spacecat-shared-utils/src/helpers.js#L39

Start in packages/spacecat-shared-utils/src/helpers.js around line 39 and trace how isAuditsDisabled resolves organization and site auditTypeConfigs. Reproduce the broken-backlinks example, then verify that a site-level enabled value returns false despite the organization-level disabled value, while other configuration behavior remains unchanged.

Written by the indexing model from the issue text.