feat: Threaded PDF pipeline (#1951)

* Initial async pdf pipeline

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* UpstreamAwareQueue

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Refactoring into async pipeline primitives and graph

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Cleanups and safety improvements

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Better threaded PDF pipeline

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Pin docling-ibm-models

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Remove unused args

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Add test

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Revise pipeline

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Unload doc backend

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Revert "Unload doc backend"

This reverts commit 01066f0b6e.

* Remove redundant method

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Update threaded test

Signed-off-by: Ubuntu <ubuntu@ip-172-31-30-253.eu-central-1.compute.internal>

* Stop accumulating docs in test run

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Fix: don't starve on docs with > max_queue_size pages

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Fix: don't starve on docs with > max_queue_size pages

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* DCO Remediation Commit for Christoph Auer <cau@zurich.ibm.com>

I, Christoph Auer <cau@zurich.ibm.com>, hereby add my Signed-off-by to this commit: fa71cde950
I, Ubuntu <ubuntu@ip-172-31-30-253.eu-central-1.compute.internal>, hereby add my Signed-off-by to this commit: d66da87d96

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Fix: python3.9 compat

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Option to enable threadpool with doc_batch_concurrency setting

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Clean up unused code

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Fix settings defaults expectations

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Use released docling-ibm-models

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Remove ignores for typing/linting

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

---------

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>
Signed-off-by: Ubuntu <ubuntu@ip-172-31-30-253.eu-central-1.compute.internal>
Co-authored-by: Ubuntu <ubuntu@ip-172-31-30-253.eu-central-1.compute.internal>

tests/test_settings_load.py

@@ -25,5 +25,5 @@ def test_settings():
     assert m.settings.debug.visualize_raw_layout is True
 
     # Check nested defaults
-    assert m.settings.perf.doc_batch_size == 2
+    assert m.settings.perf.doc_batch_size == 1
     assert m.settings.debug.visualize_ocr is False