Agent Observatory v0.1.2

🎯 Developer Experience Boost

• Ergonomic helpers: Replace session.span("name", kind="agent_step") with session.agent_step("name")
• Automatic tracing: Decorators @trace_agent_step, @trace_tool_call, @trace_llm_call eliminate manual session management
• Simplified events: Public event() method replaces internal _emit_event()

🐛 New Debugging Capabilities

• ConsoleExporter: Immediate pretty-printed terminal feedback for development
• FileExporter: JSONL logging compatible with obs-view CLI tool
• CLI Tool: obs-view for viewing and tailing trace files with formatted output

🏗️ Infrastructure Improvements

• Thread-safe RingBuffer for concurrent access in async mode
• Clock refactoring: Separate wall-clock (export) from monotonic (duration) for distributed tracing
• Modern type hints: Updated to dict[str, Any] and str | None syntax

✅ Core Principles Maintained

• Fail-open semantics preserved
• No breaking changes to public APIs
• Synchronous exporter contract maintained
• Backward compatibility ensured