* Add ambient agents documentation
Document how to build event-driven ambient agents using ADK trigger
endpoints and the /run endpoint. Covers Pub/Sub, Eventarc (Standard
and Advanced), Cloud Scheduler, concurrency control, retry logic,
session lifecycle, and deployment to Cloud Run.
* Address reviewer feedback: clarify event processing flow
- Move "How events are processed" higher, right after trigger endpoints
intro, so the mental model comes before setup instructions
- Reword step 5: explicitly describe status code behavior (200 = ack,
500 = retry) instead of vague "determines whether to retry"
- Clarify that trigger endpoints auto-create sessions without needing
the --auto_create_session flag
- Restructure heading hierarchy under "Using trigger endpoints"
* Address reviewer feedback from koverholt
- Use named sections (--8<-- [start/end]) in code snippets to hide
license headers in doc embeds
- Change model to gemini-flash-latest alias
- Restructure: show example agent first, then enable instructions,
then "Try it locally" with step-by-step commands and curl test
- Fix port consistency (curl uses 8000 matching adk api_server default)
- Add curl example for /run endpoint
---------
Co-authored-by: Kristopher Overholt <koverholt@google.com>
eliasecchig