* fix(cron): publish agent response to outbound bus for cron-triggered jobs
When a cron job triggers agent execution via ProcessDirectWithChannel,
the agent response was silently discarded — the code assumed AgentLoop
would auto-publish it, but SendResponse is false on this path.
Delegate to PublishResponseIfNeeded (exported from AgentLoop) so the
response reaches the originating channel (e.g. Telegram) only when the
message tool did not already deliver content in the same round.
Also adds a "directive" message type to CronPayload, allowing cron jobs
to instruct the agent to execute a task rather than echo static text.
* fix(cron): add type validation and directive test coverage
Address reviewer blocking feedback:
1. Server-side whitelist for `type` parameter — the `enum` in
Parameters() is only an LLM schema hint; any string was persisted.
Now `addJob` rejects values other than "message" and "directive".
2. Comprehensive test coverage for the directive code path:
- directive adds prompt prefix to ProcessDirectWithChannel
- deliver=true + directive routes through agent (not direct publish)
- directive prompt content, sessionKey, channel, chatID are correct
- invalid type is rejected; valid types ("", "message", "directive") pass
- deliver=true message type goes directly to bus (regression)
- agent error path does not trigger publish (regression)
Also merge the two UpdateJob calls in addJob into one to avoid
redundant disk I/O (non-blocking suggestion from review).
* fix(cron): remove omitempty from CronPayload.Type for consistent JSON
Empty string and "message" are semantically equivalent defaults;
always serializing the field avoids asymmetric JSON output.
* test(cron): remove redundant test, strengthen error path coverage
- Remove ExecuteJobDirectivePassesCorrectContent: its assertions on
sessionKey/channel/chatID duplicate ExecuteJobPublishesAgentResponse;
its prompt check duplicates DirectiveAddsPromptPrefix.
- Strengthen DirectiveAddsPromptPrefix with exact prompt match and
publish response assertion.
- Fix ReturnsErrorWithoutPublish: set non-empty stub response so the
test verifies the error branch early-return, not the response==""
guard.
* fix(ci): satisfy golines and gosmopolitan in cron code
e414b82ac3