chore(main): release 1.12.0

[adk-java-releases-bot]

🤖 I have created a release beep boop

1.12.0 (2026-10-09)

Features

• add an injectable scheduler for ADK's internal fan-out (1b89d23)
• add Context as the common base of CallbackContext and ToolContext (1309d38)
• add injectable time and UUID providers for timestamps and ids (caccc7c)
• add the experimental Node and BaseNode workflow types (189d463)
• add the workflow fields Event.output, Event.nodeInfo and EventActions.route (e823fba)
• carry the continuation token across the Kotlin engine interop (b3f0665)

Bug Fixes

• a2a: skip an unconvertible remote A2A part instead of failing the turn (9debe96)
• run approved tool confirmations for agents under a ParallelAgent (f866804)
• send MCP tool input schemas in chat completions requests (ce88237)
• spring-ai: order SpringAIAutoConfiguration after Spring AI model auto-configurations (d342a95)
• stop losing event fields on Vertex AI session reloads (887f9da)
• wait for the transfer event to be persisted before running the transfer target (9f5d5ce)

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