* add metrics endpoint for an organization to return completed and total security tasks
* refactor metrics fetch to use sql sproc for efficiency rather than having to pull all security task data
* add separate response model for security task metrics endpoint
* Pascal Case to match existing implementations
* refactor org to organization for consistency with other methods
* alter security task endpoint:
- remove "count" from variable naming
- update sproc naming
* remove enablement check
* replace orgId with organizationId
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