chore(deps): Bump langgraph from 1.1.2 to 1.2.6

[dependabot]

Bumps langgraph from 1.1.2 to 1.2.6.

Release notes

Sourced from langgraph's releases.

langgraph==1.2.6

Changes since 1.2.5

• release(langgraph): 1.2.6 (#8139)
• fix: nested subgraph inherits parent checkpoint_ns (regression in 1.2.3) (#8053)
• fix: cancel running subgraphs on v3 stream abort [closes #8029] (#8057)
• release(cli): 0.4.30 (#8101)
• docs: standardize package README.md structure (#8064)
• chore(deps): bump tornado from 6.5.5 to 6.5.6 in /libs/langgraph (#8063)

langgraph==1.2.5

Changes since 1.2.4

• release(langgraph): 1.2.5 (#8062)
• fix(langgraph): merge lc_versions config metadata (#8052)
• release(cli): 0.4.28 (#8041)
• fix: updateState bug for deltaChannel on empty thread (#8011)
• chore: migrate Python type checking to ty (#8002)
• chore(deps-dev): bump types-requests from 2.33.0.20260408 to 2.33.0.20260518 in /libs/langgraph (#7977)
• chore(deps): bump the minor-and-patch group in /libs/langgraph with 14 updates (#7975)

langgraph==1.2.4

Changes since 1.2.3

• release(langgraph): 1.2.4 (#7991)
• test(sdk-py): add factory-graph integration test exercising the server factory path (#7978)
• fix(langgraph): keep _on_started backward-compatible with overrides predating cause (#7987)

langgraph==1.2.3

Changes since 1.2.2

• release(langgraph): 1.2.3 (#7945)
• feat(langgraph): wire RemoteGraph.interleave to sdk-py interleave_projections (#7938)
• feat(langgraph): add v3 streaming support to RemoteGraph (#7927)
• feat(langgraph): name tool-dispatched subagents via lc_agent_name (#7928)
• fix(langgraph): rename ProtocolEvent.eventId to event_id to match the wire field (#7942)
• fix(langgraph): merge instead of overwrite in ensure_config for callbacks, tags, metadata, configurable (#7926)
• fix(langgraph): [LSD-1507] Distinguish between user cancelled and other cancellations (#7920)
• fix(cli): bump api bound to 0.10.0 (#7922)
• feat(sdk-py): add websocket stream transports (#7830)
• feat(sdk-py): add messages and tool call projections (#7823)
• feat(sdk-py): add v3 streaming primitives and SSE transport (#7818)

langgraph==1.2.2

Changes since 1.2.1

• chore(langgraph): bump version to 1.2.2 (#7914)
• fix(langgraph): assign stable IDs to id=None BaseMessages before DeltaChannel checkpoint writes (#7913)
• release(checkpoint): 4.1.1 (#7890)

... (truncated)

Commits

• ce6c8b2 release(langgraph): 1.2.6 (#8139)
• 9100f2c feat: add delta-channel-dump recovery script as examples to dump from Postgre...
• 79befe6 fix: nested subgraph inherits parent checkpoint_ns (regression in 1.2.3) (#8053)
• 9af2521 fix: cancel running subgraphs on v3 stream abort [closes #8029] (#8057)
• 1a9baae release(cli): 0.4.30 (#8101)
• 916025d feat(cli): support compatible api version ranges (#8023)
• 9732084 ci(deps): pin GitHub Actions to commit SHAs (#8065)
• 8558481 docs: standardize package README.md structure (#8064)
• 4cf120d chore(deps): bump tornado from 6.5.5 to 6.5.6 in /libs/langgraph (#8063)
• 7ab79f9 release(langgraph): 1.2.5 (#8062)
• Additional commits viewable in compare view

[dependabot]

A newer version of langgraph exists, but since this PR has been edited by someone other than Dependabot I haven't updated it. You'll get a PR for the updated version as normal once this PR is merged.

[acroca]

@dependabot recreate