fix(assign-to-agent): remove invalid requiresOneOf constraint, add GraphQL query logging

[Copilot]

The assign_to_agent validator rejected messages without issue_number or pull_number, breaking triggering-context auto-resolution — agents calling assign_to_agent(agent="copilot") with no explicit target had their output silently blocked before reaching the handler.

Validator fix

• safe_outputs_validation_config.go: Removed requiresOneOf:issue_number,pull_number from assign_to_agent. The handler already auto-resolves from workflow context when target: "triggering" (the default).
• schemas/agent-output.json: Replaced the oneOf required constraint with required: ["type"] — issue_number and pull_number are now optional.
• safe_output_type_validator.test.cjs: Updated config and test — assign_to_agent(agent="copilot") with no target fields must now pass.

GraphQL logging

• assign_agent_helpers.cjs: Added core.info() logging of the final built mutation string (both replaceActorsForAssignable and the addAssigneesToAssignable fallback) to make GraphQL failures diagnosable from run logs without ACTIONS_STEP_DEBUG.

Docs & samples

• Clarified in safe-outputs.md, safe-outputs-automation.md, and the sample workflow that issue_number/pull_number are optional when target: "triggering" — agents may omit them and the handler resolves the target from context.
• Corrected the default target example in safe-outputs-automation.md from "*" to "triggering".
• Updated safe_outputs_tools.json (both copies) field descriptions accordingly.

[Copilot]

Pull request overview

This pull request updates the assign_to_agent safe-output contract to allow omitting issue_number/pull_number when the handler can resolve the target from workflow context (target: "triggering"), and improves diagnosability of agent assignment failures by logging the final GraphQL mutation text.

Changes:

• Loosens assign_to_agent validation so calls without explicit target fields can pass when targeting the triggering context.
• Adds core.info() logging for the final and fallback GraphQL mutations used during agent assignment.
• Updates docs and tool schemas/samples to reflect the optionality of issue_number/pull_number in triggering mode.

Show a summary per file

File	Description
schemas/agent-output.json	Adjusts the JSON schema for assign_to_agent to make issue_number/pull_number optional.
pkg/workflow/safe_outputs_validation_config.go	Removes the requiresOneOf validation rule from assign_to_agent in the Go validation config.
pkg/workflow/js/safe_outputs_tools.json	Updates tool descriptions to document triggering-context auto-resolution and refines wording/formatting.
actions/setup/js/safe_outputs_tools.json	Mirrors the tool description updates for the action-side copy.
actions/setup/js/safe_output_type_validator.test.cjs	Updates validator test config and expectations so assign_to_agent without target fields now passes.
actions/setup/js/assign_agent_helpers.cjs	Logs the final constructed GraphQL mutation strings for easier debugging from run logs.
docs/src/content/docs/reference/safe-outputs.md	Documents that issue_number/pull_number may be omitted in triggering mode.
.github/aw/safe-outputs-automation.md	Fixes the default assign-to-agent.target example and clarifies omission behavior in triggering mode.
pkg/cli/workflows/test-assign-to-agent.md	Updates the sample workflow task text/examples to show omitting issue_number for triggering issues.

Copilot's findings

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• Files reviewed: 9/9 changed files
• Comments generated: 2