chore: Uses pydantic `Field` for Agent configs, so that the generated…

… AgentConfig.json json schema can carry field description

PiperOrigin-RevId: 797094012

chore: add contributing spanner sample

PiperOrigin-RevId: 795154839

chore: Bump version number to 1.10.0

PiperOrigin-RevId: 792206610

chore: Bump version and update CHANGELOG for v1.9.0

PiperOrigin-RevId: 789494584

chore: Bump version and update CHANGELOG for v1.9.0

PiperOrigin-RevId: 789494584

fix: ModuleNotFound error should be caught when dependencies of Local…

…EvalService are not installed

Once caught we publish the clarifying message to install the extra.

PiperOrigin-RevId: 785999033

chore: Release 1.7.0

PiperOrigin-RevId: 783918022

chore: Release 1.6.0

PiperOrigin-RevId: 781272837

chore: Enhance a2a part converters

a. fix binary data conversion
b. support thoughts, code execution result, executable codes conversion

PiperOrigin-RevId: 775827259

chore: bump version number to 1.4.2

PiperOrigin-RevId: 773867075