Feat: convenience method for generate task subtrees

Convenience method for generating task subtrees with auto-validation & self-healing.

Feat: embeddings

Support for embedding generation.

Fix: split validations issues

FIxed an issue with split validations where validation nodes would output strings due to mismatching overloads.

Enh: create_validation_nodes overloads

Added overloads to create_validation_nodes()

Feat: split validation nodes

Validation can now be split with one node per test.

Fix: eval issues

• Eval issues now follow the _eval naming pattern for prompting purposes
• Only failed tests are fed back into the task's eval for reprocessing

Fix: .task() issue

Fixed an issue where BaseWorkflow.task() would return a boolean instead of the node's output.

Fix: exposed LLMConfig import

Exposed missing LLMConfig import.

Fix: create_validation_nodes output evals

create_validation_nodes now evaluates outputs from source node at runtime.

BaseValidation & others

• Added BaseValidation class & builder method (in BaseWorkflow).
• Enhanced type injection to inherit all Field properties from the parent class.
• Alternative models made available for validation nodes.