Add missing provider: field to all actor examples in examples/actors/.
Fix llm_with_tools.yaml actor name from assistants/file_analyzer to
local/assistants-file_analyzer (custom actors must use local/ namespace
and cannot contain two slashes).
Add validate-all command to helper_actor_examples.py that uses ActorLoader
to validate all examples via business logic checks. Add integration test
Validate All Actor Examples Import Without Errors to actor_examples.robot
that confirms every example in examples/actors/ can be imported without
errors.
ISSUES CLOSED: #1504
freemo