fix: improve document processing pipeline and UI

- Make validation and routing stages resilient (continue with defaults on failure)
- Improve quality score and routing decision extraction from database
- Add comprehensive logging for debugging invoice field extraction
- Remove Invoice Details section from Document Results page
- Add processing_summary to DocumentResults interface
- Enhance field extraction logic with better fallbacks
- Save validation and routing extraction results to database

Author: T-DevH

src/api/agents/document/action_tools.py

@@ -0,0 +1,33 @@
+# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# 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.
+
+"""Document processing services."""
+
+from .document_db_service import DocumentDBService, get_document_db_service
+from .retry_handler import retry_with_backoff, retryable, RetryConfig, CircuitBreaker
+from .job_queue import JobQueue, JobStatus, get_job_queue
+
+__all__ = [
+    "DocumentDBService",
+    "get_document_db_service",
+    "retry_with_backoff",
+    "retryable",
+    "RetryConfig",
+    "CircuitBreaker",
+    "JobQueue",
+    "JobStatus",
+    "get_job_queue",
+]
+