chore(main): release 1.10.0

[adk-java-releases-bot]

🤖 I have created a release beep boop

1.10.0 (2026-09-10)

Features

• add @experimental annotation for unstable ADK APIs (69914f4)
• add EventActions.agentState for session-resumability checkpoints (8505a01)
• add one-way ADK Java to Kotlin engine interop module (baff584)
• add opt-in ResumabilityConfig flag for plain-text continuation auto-resume (f0fb722)
• Add unique event_id to BigQuery agent analytics events (15c70de)
• fire ADK Java plugin tool callbacks for native Kotlin tools (fda5a10)
• run an ADK Kotlin-engine runner behind the ADK Java Runner API (6ff8241)

Bug Fixes

• memory: format search timestamps as epoch millis (5269b87)
• models: set additionalProperties on schemas for OpenAI strict structured outputs (4b058cd)
• sessions: forward the caller-supplied session id in VertexAiSessionService (77eae25)
• sessions: validate HTTP status before parsing Vertex AI session responses (4192aca)

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