V3 post step 2 refinement: add temperature & top-p settings to config (and .env), add prompt fields back to job table so that the prompt settings get frozen at runtime for all sources being processed.

tests/services/test_store.py

@@ -56,6 +56,8 @@ async def test_create_job_for_document_sorts_uploads_and_creates_links(async_ses
     assert created_job is not None
     assert created_job.provider == "openrouter"
     assert created_job.model == "test-model"
+    assert created_job.prompt_name == "transcribe_document.md"
+    assert created_job.user_prompt is not None
 
     sources = (
         await async_session.exec(
@@ -78,7 +80,6 @@ async def test_create_job_for_document_sorts_uploads_and_creates_links(async_ses
     job_sources = (await async_session.exec(select(JobSource).where(JobSource.job_id == result.job_id))).all()
     assert len(job_sources) == 2
     assert set(result.source_ids) == {job_source.source_id for job_source in job_sources}
-    assert {job_source.prompt_name for job_source in job_sources} == {None}
 
 
 @pytest.mark.asyncio
@@ -110,6 +111,10 @@ async def test_create_upload_job_stores_source_under_document_id_directory(async
     assert source.file_hash == "2c8648d103e3dd7ad87660da0f126a1443b6d21ac1bd3ec000c5e24e2373a90c"
     assert source.file_size_bytes == len(b"image-bytes")
 
+    created_job = await async_session.get(Job, result.job_id)
+    assert created_job is not None
+    assert created_job.prompt_name == "transcribe_document.md"
+
 
 def test_store_person_portrait_stores_file_under_person_id_directory(tmp_path):
     settings = Settings(openrouter_api_key="test-key", upload_dir=tmp_path)