* Enhance null-safety annotations across modules and refactor for improved consistency:
- Added `null!` annotations to enforce non-nullability expectations.
- Updated workflows, tests, and runtime services to handle default null values reliably.
- Removed obsolete and unused APIs, simplifying interfaces and improving maintainability.
- Refactored methods and properties for clarity, thread-safety, and consistency.
- Adjusted test configurations for code coverage tracking and integration improvements.
* Refactor activity iteration in container serialization tests to simplify type casting.
* Simplify test setup by removing `Input` wrapper and fix trimming warnings with `UnconditionalSuppressMessage` annotations.
* Add trimming warning suppression to `ArgumentJsonConverter` with `UnconditionalSuppressMessage`
- Annotated `Read` method to suppress `IL2055` warning caused by dynamic type resolution.
- Provided justification reflecting dynamic type registration in the well-known type registry.
* Add root namespace to project file and suppress EF Core usage warning
- Added `RootNamespace` property to `Elsa.Persistence.EFCore.Common.csproj` for consistency.
- Annotated `DbSchemaAwareMigrationAssembly` with `SuppressMessage` to suppress EF1001 usage warning and provide justification.
* Suppress obsolete API warnings in workflow runtime projects
- Added `#pragma warning disable CS0618` to suppress obsolete member warnings in `ObsoleteWorkflowRuntime.cs`, `LocalWorkflowRuntime.Obsolete.cs`, and `DistributedWorkflowRuntime.Obsolete.cs`.
- Updated `Directory.Build.props` to globally suppress `CS0618` for backward compatibility during migration.
* Annotate properties with non-nullable default initializers across modules to enforce null safety.
* Add `Priority` and `Deprecated` properties to `StorageDriverDescriptor` model
* Update src/modules/Elsa.Workflows.Runtime.Distributed/Services/DistributedWorkflowRuntime.Obsolete.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Update src/modules/Elsa.Workflows.Runtime/Services/ObsoleteWorkflowRuntime.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Update src/modules/Elsa.Workflows.Runtime/Services/LocalWorkflowRuntime.Obsolete.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Clean up XML comments and improve consistency across modules.
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Restore EF Core persistence layer
Originally, we had moved EF Core to the extensions repo, but in practice this turned out to be rather impractical when debugging elsa-core, given that we would lose all of the state (workflow definitions, instances, etc.) across application restarts.
* Integrate PostgreSQL support into EF Core persistence and enhance BlobStorage workflows provider setup.
