Add return type annotations and use 201 for upload

All endpoint functions, lifespan context manager, and get_connection now
have explicit return types. Upload endpoint returns 201 Created instead
of 200 to follow REST conventions.

document-parser/api/analyses.py

@@ -46,7 +46,7 @@ def _to_response(job) -> AnalysisResponse:
 
 
 @router.post("", response_model=AnalysisResponse)
-async def create_analysis(body: CreateAnalysisRequest, service: ServiceDep):
+async def create_analysis(body: CreateAnalysisRequest, service: ServiceDep) -> AnalysisResponse:
     """Create a new analysis job for a document."""
     if not body.documentId or not body.documentId.strip():
         raise HTTPException(status_code=400, detail="documentId is required")
@@ -72,14 +72,14 @@ async def create_analysis(body: CreateAnalysisRequest, service: ServiceDep):
 
 
 @router.get("", response_model=list[AnalysisResponse])
-async def list_analyses(service: ServiceDep):
+async def list_analyses(service: ServiceDep) -> list[AnalysisResponse]:
     """List all analysis jobs."""
     jobs = await service.find_all()
     return [_to_response(j) for j in jobs]
 
 
 @router.get("/{job_id}", response_model=AnalysisResponse)
-async def get_analysis(job_id: str, service: ServiceDep):
+async def get_analysis(job_id: str, service: ServiceDep) -> AnalysisResponse:
     """Get a single analysis job."""
     job = await service.find_by_id(job_id)
     if not job:
@@ -88,7 +88,9 @@ async def get_analysis(job_id: str, service: ServiceDep):
 
 
 @router.post("/{job_id}/rechunk", response_model=list[ChunkResponse])
-async def rechunk_analysis(job_id: str, body: RechunkRequest, service: ServiceDep):
+async def rechunk_analysis(
+    job_id: str, body: RechunkRequest, service: ServiceDep
+) -> list[ChunkResponse]:
     """Re-chunk a completed analysis with new chunking options."""
     try:
         chunks = await service.rechunk(job_id, body.chunkingOptions.model_dump())
@@ -107,7 +109,7 @@ async def rechunk_analysis(job_id: str, body: RechunkRequest, service: ServiceDe
 
 
 @router.delete("/{job_id}", status_code=204)
-async def delete_analysis(job_id: str, service: ServiceDep):
+async def delete_analysis(job_id: str, service: ServiceDep) -> None:
     """Delete an analysis job."""
     deleted = await service.delete(job_id)
     if not deleted:

document-parser/api/documents.py

@@ -25,8 +25,8 @@ def _to_response(doc) -> DocumentResponse:
     )
 
 
-@router.post("/upload", response_model=DocumentResponse)
-async def upload(file: UploadFile):
+@router.post("/upload", response_model=DocumentResponse, status_code=201)
+async def upload(file: UploadFile) -> DocumentResponse:
     """Upload a PDF document."""
     if not file.filename:
         raise HTTPException(status_code=400, detail="No filename provided")
@@ -50,14 +50,14 @@ async def upload(file: UploadFile):
 
 
 @router.get("", response_model=list[DocumentResponse])
-async def list_documents():
+async def list_documents() -> list[DocumentResponse]:
     """List all documents."""
     docs = await document_service.find_all()
     return [_to_response(d) for d in docs]
 
 
 @router.get("/{doc_id}", response_model=DocumentResponse)
-async def get_document(doc_id: str):
+async def get_document(doc_id: str) -> DocumentResponse:
     """Get a single document."""
     doc = await document_service.find_by_id(doc_id)
     if not doc:
@@ -66,7 +66,7 @@ async def get_document(doc_id: str):
 
 
 @router.delete("/{doc_id}", status_code=204)
-async def delete_document(doc_id: str):
+async def delete_document(doc_id: str) -> None:
     """Delete a document and its file."""
     deleted = await document_service.delete(doc_id)
     if not deleted:
@@ -78,7 +78,7 @@ async def preview(
     doc_id: str,
     page: int = Query(1, ge=1),
     dpi: int = Query(150, ge=72, le=300),
-):
+) -> Response:
     """Generate a PNG preview of a specific PDF page."""
     doc = await document_service.find_by_id(doc_id)
     if not doc:

document-parser/main.py

@@ -12,6 +12,7 @@ Conversion engine is selected via CONVERSION_ENGINE env var:
 from __future__ import annotations
 
 import logging
+from collections.abc import AsyncIterator
 from contextlib import asynccontextmanager
 
 from fastapi import FastAPI
@@ -72,7 +73,7 @@ def _build_analysis_service() -> AnalysisService:
 
 
 @asynccontextmanager
-async def lifespan(app: FastAPI):
+async def lifespan(app: FastAPI) -> AsyncIterator[None]:
     await init_db()
     app.state.analysis_service = _build_analysis_service()
     logger.info("Docling Studio backend ready (engine=%s)", settings.conversion_engine)
@@ -98,7 +99,7 @@ app.include_router(analyses_router)
 
 
 @app.get("/api/health")
-def health():
+def health() -> dict[str, str]:
     """Health check endpoint."""
     return {
         "status": "ok",

document-parser/persistence/database.py

@@ -4,6 +4,7 @@ from __future__ import annotations
 
 import logging
 import os
+from collections.abc import AsyncIterator
 from contextlib import asynccontextmanager
 
 import aiosqlite
@@ -82,7 +83,7 @@ async def get_db() -> aiosqlite.Connection:
 
 
 @asynccontextmanager
-async def get_connection():
+async def get_connection() -> AsyncIterator[aiosqlite.Connection]:
     """Context manager that opens and auto-closes a database connection."""
     db = await get_db()
     try:

document-parser/tests/test_api_endpoints.py

@@ -89,7 +89,7 @@ class TestDocumentEndpoints:
             "/api/documents/upload",
             files={"file": ("uploaded.pdf", b"fake-pdf-content", "application/pdf")},
         )
-        assert resp.status_code == 200
+        assert resp.status_code == 201
         data = resp.json()
         assert data["id"] == "new-1"
         assert data["filename"] == "uploaded.pdf"