chore: add agents/reports to gitignore and update agent infrastructure with timestamp streaming, write budget, and codename generation

- Add `agents/reports/` to `.gitignore` to prevent generated agent report files from being tracked
- Implement `_TimestampStream` class and `install_timestamps()` function in `agents/agent.py` for prefixing stdout/stderr with timestamps and elapsed time
- Export `install_timestamps`, `set_write_budget`, `clear_write_budget`, and `set_shell_restricted` from `agents/base.py`; add `_RUN_LOCK`, `AGENT_ICONS` dictionary, and `WRITE_BUDGET = 20` constant
- Add `report_codename()` function and `CODENAME_ADJECTIVES`/`CODENAME_ANIMALS` tuples to `agents/core/__init__.py` for generating random agent report codenames
- Expand `WRITE_TOOLS` tuple in `agents/core/__init__.py` to include `replace_lines`, `insert_lines`, and `delete_lines`; remove `SWARM_TOOLS` from `payloads_for` exclusion list
- Update `CLAUDE.md` and `AGENTS.md` documentation with dataset column initialization rules and new agent infrastructure details
- Reorder route table in `README.md` to list `/uploads` before `/messages` and document Swagger/ReDoc/OpenAPI schema endpoints

devplacepy/push.py

@@ -243,15 +243,15 @@ async def notify_user(user_uid: str, payload: dict[str, Any]) -> None:
         for subscription in registrations:
             endpoint = subscription["endpoint"]
             try:
-                notification_info = create_notification_info_with_payload(
+                notification_payload = create_notification_info_with_payload(
                     endpoint,
                     subscription["key_auth"],
                     subscription["key_p256dh"],
                     body,
                 )
-                headers = {**notification_info["headers"], "TTL": PUSH_TTL_SECONDS}
+                headers = {**notification_payload["headers"], "TTL": PUSH_TTL_SECONDS}
                 response = await client.post(
-                    endpoint, headers=headers, content=notification_info["data"]
+                    endpoint, headers=headers, content=notification_payload["data"]
                 )
             except (httpx.HTTPError, ValueError) as exc:
                 logger.warning("Push error for %s via %s: %s", user_uid, endpoint, exc)