This change adds a new enum value which the agent builder can pass in the `BigQueryToolConfig` to allow limited writes to the `execute_sql` tool.
PiperOrigin-RevId: 776661744
Fixes https://github.com/google/adk-python/issues/1180
We are using `func.now()` to set the `onupdate` time for db, when SQLAlchemy generates the SQL to build the database, it actually translates `func.now()` into `NOW()` or `CURRENT_TIMESTAMP`. The value it returns depends on the database server settings. For example, if the global/default timezone for a db is set to be UTC, the update time will be set to be a UCT time; if the global time zone for a db is set to be a local time zone (e.g. America/Los_Angeles), the update time will be a local time.
Normally, the best practice is to set database server to use UTC. Applications will convert it into different time zones as needed.
For SQLite, there is no way to config the default timezone, it will just treat it as UTC. But because it is a naive datetime (with no timezone info), python will assume it is a local time and then covert it into a UTC, which is why we see the bug (e.g. we create a session at 2025-06-17 12:49:33 local time, but when we read the session, its last update time is 2025-06-17 19:49:33 local time).
The solution is converting the native datatime to be timezone aware before `.timestamp()`.
The change in this CL only affects SQLite database.
PiperOrigin-RevId: 776654443
Merge https://github.com/google/adk-python/pull/1679
Contributing doc says to do the following:
```sh
uv sync --extra test --extra eval
pytest ./tests/unittests
```
If you follow this the tests will fail:
```sh
tests/unittests/a2a/executor/test_task_result_aggregator.py:27: in <module>
from a2a.types import Message
E ModuleNotFoundError: No module named 'a2a'
```
This makes sense since the `a2a` package is not part of ADK's core dep, it is an extra:
https://github.com/google/adk-python/blob/e79651cd86ba3f0c998109f2140f1db2cab78708/pyproject.toml#L79-L83
Thus for a2a tests to pass we must include the extra in the sync command:
```sh
uv sync --extra test --extra eval --extra a2a
pytest ./tests/unittests
```
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/adk-python/pull/1679 from jackwotherspoon:main c1a536780409065db817088a8d5ed5979cca8d8f
PiperOrigin-RevId: 776617515
