fix: update docling dependency to use docling_core instead (#8714)

* chore: update dependencies in pyproject.toml and uv.lock

* Updated `docling` to `docling_core>=2.38.0` in `pyproject.toml`.
* Removed outdated `docling` package entries from `uv.lock`.
* Adjusted dependency markers for `gassist` and `triton` to improve compatibility across platforms.

* chore: downgrade docling_core dependency in pyproject.toml

* Changed `docling_core` version from `>=2.38.0` to `>=2.36.1` for compatibility.
* Added optional dependency group for `docling` with the updated version.

* Added traceloop.py and initialized in service.py, also updated pyproject.toml

* updated returned callbacks list length from 5 to 6. Formatted service.py

* [autofix.ci] apply automated fixes

* OpenInference span kind replaced with Opentelemetry Span kind

* Added traceloop.py and initialized in service.py, also updated pyproject.toml

* updated returned callbacks list length from 5 to 6. Formatted service.py

* [autofix.ci] apply automated fixes

* OpenInference span kind replaced with Opentelemetry Span kind

* Added traceloop.py and initialized in service.py, also updated pyproject.toml

* updated returned callbacks list length from 5 to 6. Formatted service.py

* [autofix.ci] apply automated fixes

* OpenInference span kind replaced with Opentelemetry Span kind

* Updated as per coderabbitai suggested and tested

* Fixed deprecated NoneType

* code formatted

* revert uv.lock

* add new line to uv.lock

* updated service.py

* [autofix.ci] apply automated fixes

* fix(DoclingInlineComponent): add import error handling for missing Docling module

* Revert "Merge branch '2getsandesh/main' into remove-torch-deps"

This reverts commit b95891f0e27e8620873fbe97116709ca5de41e51, reversing
changes made to 9e0f1ae30a6655a82948546035147e0e2fc924ae.

---------

Co-authored-by: Sandesh R <2getsandesh@gmail.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Sandesh R <Sandesh.R24@ibm.com>
Co-authored-by: Edwin Jose <edwin.jose@datastax.com>

pyproject.toml

@@ -124,9 +124,8 @@ dependencies = [
     "cleanlab-tlm>=1.1.2",
     'gassist>=0.0.1; sys_platform == "win32"',
     "twelvelabs>=0.4.7",
+    "docling_core>=2.36.1",
     "filelock>=3.18.0",
-    "docling>=2.36.1",
-    "filelock>=3.18.0"
 ]
 
 [dependency-groups]
@@ -193,6 +192,10 @@ Repository = "https://github.com/langflow-ai/langflow"
 Documentation = "https://docs.langflow.org"
 
 [project.optional-dependencies]
+docling = [
+    "docling>=2.36.1",
+]
+
 audio = [
     "webrtcvad>=2.0.10",
 ]