feat: add core OCR API integration (refs #65)

OCR Service (Python/FastAPI):
- POST /extract for synchronous OCR extraction
- POST /jobs and GET /jobs/{job_id} for async processing
- Image preprocessing (deskew, denoise) for accuracy
- HEIC conversion via pillow-heif
- Redis job queue for async processing

Backend (Fastify):
- POST /api/ocr/extract - authenticated proxy to OCR
- POST /api/ocr/jobs - async job submission
- GET /api/ocr/jobs/:jobId - job polling
- Multipart file upload handling
- JWT authentication required

File size limits: 10MB sync, 200MB async
Processing time target: <3 seconds for typical photos

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ocr/app/main.py

@@ -1,14 +1,44 @@
 """OCR Service FastAPI Application."""
+import logging
+from contextlib import asynccontextmanager
+from typing import AsyncIterator
+
 from fastapi import FastAPI
 
 from app.config import settings
+from app.routers import extract_router, jobs_router
+from app.services import job_queue
+
+# Configure logging
+logging.basicConfig(
+    level=getattr(logging, settings.log_level.upper(), logging.INFO),
+    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
+)
+logger = logging.getLogger(__name__)
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI) -> AsyncIterator[None]:
+    """Application lifespan handler for startup/shutdown."""
+    # Startup
+    logger.info("OCR service starting up")
+    yield
+    # Shutdown
+    logger.info("OCR service shutting down")
+    await job_queue.close()
+
 
 app = FastAPI(
     title="MotoVaultPro OCR Service",
     description="OCR processing service for vehicle documents",
     version="1.0.0",
+    lifespan=lifespan,
 )
 
+# Include routers
+app.include_router(extract_router)
+app.include_router(jobs_router)
+
 
 @app.get("/health")
 async def health_check() -> dict:
@@ -23,4 +53,9 @@ async def root() -> dict:
         "service": "mvp-ocr",
         "version": "1.0.0",
         "log_level": settings.log_level,
+        "endpoints": [
+            "POST /extract - Synchronous OCR extraction",
+            "POST /jobs - Submit async OCR job",
+            "GET /jobs/{job_id} - Get async job status",
+        ],
     }