feat(console): add Artemis Admin & Trace Console backend and management plane

Introduces the comprehensive developer/administrator control plane and trace
inspection console backend for the ARTEMIS mobile automation platform.

Key Features & Backend Architecture:
- Core Server & Modular Routing:
  * FastAPI modular architecture with dedicated routers for sessions, steps, tasks, media, stream, and replay.
  * Multi-layer repository pattern with SQLite persistence for sessions, traces, and step data.
- Task Control & Queue Management:
  * FIFO asynchronous task queue service with support for single/batch goal execution and profile selection (Flash / Pro).
  * Session lifecycle controls (run, pause, resume, stop, clear queue).
  * Startup orphan cleanup and automatic older replay archiving.
- Live Telemetry & IPC Communication:
  * High-performance IPC server for streaming real-time execution logs, agent thoughts, and tool invocations.
  * Server-Sent Events (SSE) /api/stream/{session_id} endpoint for live UI updates.
- Real-Time Device Streaming:
  * Live ADB screen capture and MJPEG frame generator (/api/stream/device-live).
  * Device connectivity and state inspection endpoint (/api/stream/device-state).
- Trace Inspection & Step Replay Engine:
  * Hierarchical call tree inspection, pre/post step screenshots, and action overlay metadata.
  * Isolated single-step replay manager (/api/replay) for interactive debugging and validation.

apps/admin_console/schemas/__init__.py

@@ -0,0 +1 @@
+# Copyright 2026 Google LLC

apps/admin_console/schemas/task_schema.py

@@ -0,0 +1,28 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from pydantic import BaseModel
+
+
+class RunRequest(BaseModel):
+    goal: str | None = None
+    goals: list[str] | None = None
+    profile: str | None = "flash"
+
+
+class ReplayRequest(BaseModel):
+    device_id: str
+    user_submits: dict
+    tool_name: str = "ask_explorer"
+    replay_id: str | None = None