feat: BreakPilot PWA - Full codebase (clean push without large binaries)

All services: admin-v2, studio-v2, website, ai-compliance-sdk,
consent-service, klausur-service, voice-service, and infrastructure.
Large PDFs and compiled binaries excluded via .gitignore.

agent-core/sessions/__init__.py

@@ -0,0 +1,25 @@
+"""
+Session Management for Breakpilot Agents
+
+Provides:
+- AgentSession: Individual agent session with context and checkpoints
+- SessionManager: Create, retrieve, and manage agent sessions
+- HeartbeatMonitor: Monitor agent liveness
+- SessionState: Session state enumeration
+"""
+
+from agent_core.sessions.session_manager import (
+    AgentSession,
+    SessionManager,
+    SessionState,
+)
+from agent_core.sessions.heartbeat import HeartbeatMonitor
+from agent_core.sessions.checkpoint import CheckpointManager
+
+__all__ = [
+    "AgentSession",
+    "SessionManager",
+    "SessionState",
+    "HeartbeatMonitor",
+    "CheckpointManager",
+]