* Update job activities handler
Looks like somehow implicit global usings have been removed or disabled 🤔
* Implement background activity execution
* Checkbox UI improvements
* Implement Task configuration for asynchronous execution
* Make job queue hosted service process jobs in parallel
* Make job worker count configurable
* Delete DefaultWorkflowInvoker.cs
* Incremental work
* Refactor runtime
* Implement workflow state store + bookmark store
* Cleanup
* Update migrations
* Move store abstractions to management and runtime projects
* Consolidate persistence providers into single package
* Generate migrations
* Regenerate migrations
* Fix DI of memory stores
* Update migrations
* Refactor definition reference due to unserializable record
* Update web server bundle to use EF core by default
* Update Bookmark.cs
Fixes System Text Json deserialization
* Incremental work on custom activities
* Incremental work on refactoring versioned entities
* Add ActivityDefinition infrastructure
* Incremental work on activity definition manager
* Incremental work on API endpoints
* Refactored flowchart component to include hierarchical nav
* Incremental work on modularization of designer component
* Restructuring into modules
* Rename CustomActivities module
* Apply security
* Fix activity definition GET endpoint
* Incremental work on activity definition provider
* Incremental work on activity definition execution
* Update ActivityDefinitionMaterializer.cs
* Update ActivityDefinitionActivityProvider.cs
* Add activity definition referenced version update handler
* Maintain position of not found activity
* Fix prefix naming
