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
## Summary
Add a `code_review.yaml` actor example that uses Claude Opus 4 with file and git tools to perform automated code reviews against the project's review playbook.
### Changes
- **New file**: `examples/actors/code_review.yaml` — LLM actor configured with `files/read_file`, `files/list_directory`, and `builtin/git-*` tools, with a system prompt that reads `docs/development/review-playbook.md` and diffs against `master`
- **Updated**: `features/actor_examples.feature` — bumped example count from 7 to 8 and added `code_review.yaml` to the file listing assertion
### Verification
- `nox -e lint` — passed
- `nox -e typecheck` — 0 errors
- `nox -e format -- --check` — all files formatted
- `nox -s unit_tests -- features/actor_examples.feature` — 25 scenarios passed
### Rebase Notes
- Rebased onto current master (`4d3499dc`)
- Squashed 2 commits into 1 (eliminated 3 merge commits)
- Resolved conflict in `actor_examples.feature`: master added `strategy_with_subplan.yaml` (count 7), our branch adds `code_review.yaml` (count now 8)
Reviewed-on: #458
Reviewed-by: Jeffrey Phillips Freeman <jeffrey.freeman@cleverthis.com>
Co-authored-by: Brent Edwards <brent.edwards@cleverthis.com>
Co-committed-by: Brent Edwards <brent.edwards@cleverthis.com>