Br1an d46bbd30f7 Fix: send input and output token usage to Langfuse (#13294) ...

### What problem does this PR solve?

Closes #9837

The Langfuse integration currently only sends the output text to
`langfuse_generation.update()` without including token usage
information. This means Langfuse cannot track input/output token
consumption for cost analysis and monitoring.

### Solution

Add the `usage` parameter to `langfuse_generation.update()` with:
- `input`: approximate input token count from `message_fit_in()`
- `output`: approximate output token count from
`num_tokens_from_string(answer)`
- `total`: sum of input and output

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

2026-05-14 13:11:37 +08:00

..

__init__.py

Refactor: fix typos (#10200)

2025-09-25 12:05:43 +08:00

api_service.py

Feat: Agent api (#14157)

2026-04-24 10:02:22 +08:00

canvas_service.py

feat: add tag management for Agents with filtering and sorting (#14774) (#14799)

2026-05-13 21:41:32 +08:00

chunk_feedback_service.py

feat: Auto-adjust chunk recall weights based on user feedback (#12689)

2026-04-08 09:52:18 +08:00

common_service.py

Fix: add deadlock retry (#13552)

2026-03-12 12:39:01 +08:00

connector_service.py

feat(connectors): ETag-based bypass for incremental S3 ingestion (#14628) (#14677)

2026-05-09 20:03:56 +08:00

conversation_service.py

fix: enforce tenant-scoped authorization for chatbot SDK endpoints (#14592)

2026-05-08 18:00:18 +08:00

dialog_service.py

Fix: send input and output token usage to Langfuse (#13294)

2026-05-14 13:11:37 +08:00

doc_metadata_service.py

fix(opensearch): implement doc-meta dispatch surface on OSConnection (#14577)

2026-05-11 17:04:28 +08:00

document_service.py

chore: fix some comments to improve readability (#14756)

2026-05-11 16:48:48 +08:00

evaluation_service.py

Refactor: import_test_cases use bulk_create (#12456)

2026-01-06 11:39:07 +08:00

file2document_service.py

Feat: add delete all support for delete operations (#13530)

2026-03-12 09:47:42 +08:00

file_service.py

chore: fix some comments to improve readability (#14756)

2026-05-11 16:48:48 +08:00

knowledgebase_service.py

Refact: Added a private helper _visibility_and_status_filter (#13627)

2026-05-11 15:21:41 +08:00

langfuse_service.py

Fix the consistency of ts and datetime (#12288)

2025-12-29 12:37:13 +08:00

llm_service.py

fix: migrate Langfuse integration from start_generation to start_obse… (#14205)

2026-04-24 10:03:57 +08:00

mcp_server_service.py

Fix typos: retrievaler -> retriever (#10372)

2025-10-10 09:17:36 +08:00

memory_service.py

Memory API: enforce tenant permissions on memory and message endpoints (#14535)

2026-05-06 14:10:47 +08:00

pipeline_operation_log_service.py

fix: file logs not displayed in dataset ingestion page (#14479)

2026-04-29 22:10:24 +08:00

search_service.py

Fix the consistency of ts and datetime (#12288)

2025-12-29 12:37:13 +08:00

system_settings_service.py

feat: Implement pluggable multi-provider sandbox architecture (#12820)

2026-01-28 13:28:21 +08:00

task_service.py

Allow more task logs for #14617 (#14624)

2026-05-07 15:03:08 +08:00

tenant_llm_service.py

Fix: display error (#14654)

2026-05-08 13:11:59 +08:00

user_canvas_version.py

Fix tiny issues (#14006)

2026-04-09 19:01:36 +08:00

user_service.py

Feat/tenant model (#13072)

2026-03-05 17:27:17 +08:00