chore(main): release 1.6.0

[adk-java-releases-bot]

🤖 I have created a release beep boop

1.6.0 (2026-06-29)

Features

• Add ADK Issue Monitoring (Spam Detection) Agent sample for Java (fd45dda)
• Add ADK Java Issue Triaging Agent sample (fa94438)
• Add ADK PR Triaging Agent for google/adk-java (f14f644)
• Add chat-completions API support to ApigeeLlm (df73784)
• Add ClassPathSkillSource to load skills from the Java classpath (587073a)
• Adds the ADK Stale Issue Auditor sample (b6bd2dd)
• advance SequentialAgent to later sub-agents after a HITL resume when resumability is enabled (407478b)
• Updated Spring AI to 2.0.0, ECJ, build works with Java 25 (3f6665b)

Bug Fixes

• core: allow Long values to match INTEGER schema type (a6d41cf)
• gemini: align streaming function-call handling with ADK Python (37bb5e6)
• Make dry_run configurable for ADK Java PR triage, spam detection, and issue triage workflows (4225b07)
• Make stale issue workflow configurable for dry runs (d0edd41)
• map ChatResponse usage metadata to LlmResponse (71f6929)
• map token usage metadata for Anthropic Claude model (f76c5f9)
• scope ADK Java docs release analyzer to a single language (07a2ec9)
• Use existing secrets and built-in token in ADK docs release analyzer workflow (456234f)

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