chore(deps): bump langgraph-checkpoint from 2.1.1 to 4.0.0 in /samples/mcp-functions-agent

[dependabot]

Bumps langgraph-checkpoint from 2.1.1 to 4.0.0.

Release notes

Sourced from langgraph-checkpoint's releases.

langgraph-checkpoint==4.0.0

Changes since checkpoint==3.0.1

• fix: flip default on base cache (#6677)
• fix(checkpoint): InMemorySaver context managers should return self in… (#6529)
• fix: docstring for serializer protocol (#6525)
• chore: clean up some refs (#6487)
• chore: add pyproject.toml links (#6364)

langgraph-checkpoint-postgres==3.0.5

Changes since checkpointpostgres==3.0.4

• release(checkpoint-postgres): 3.0.5 (#7221)
• fix: re-use connection (#7220)
• chore(deps): bump ruff from 0.15.5 to 0.15.6 in /libs/checkpoint-postgres in the all-dependencies group (#7194)
• chore(deps): bump the all-dependencies group across 1 directory with 2 updates (#7071)
• release(checkpoint): 0.4.1 (#6966)
• chore: add serde events (#6954)
• chore: update defaults (#6953)
• release: rc2 (#6949)
• release: Candidate (#6947)
• Merge commit from fork
• chore(deps): bump the all-dependencies group in /libs/checkpoint-postgres with 2 updates (#6916)
• chore: add make type target for type checking (#6748)
• chore: bump orjson (#6852)
• chore(deps): bump langchain-core from 1.2.7 to 1.2.11 in /libs/checkpoint-postgres (#6831)
• chore(deps): bump the all-dependencies group in /libs/checkpoint-postgres with 2 updates (#6808)

langgraph-checkpoint-postgres==3.0.4

Changes since checkpointpostgres==3.0.3

• chore: Omit lock when using connection pool (#6734)
• chore(deps): upgrade dependencies with uv lock --upgrade (#6671)
• chore: update twitter URLs (#6683)

langgraph-checkpoint-postgres==3.0.3

Changes since checkpointpostgres==3.0.2

• fix: flip default on base cache (#6677)
• docs: storage nits (#6651)

langgraph-checkpoint-sqlite==3.0.3

Changes since checkpointsqlite==3.0.2

• fix: aiosqlite's breaking change (#6699)
• chore(deps): upgrade dependencies with uv lock --upgrade (#6671)
• chore: update twitter URLs (#6683)

langgraph-checkpoint-postgres==3.0.2

Changes since checkpointpostgres==3.0.1

... (truncated)

Commits

• f91d79d fix: flip default on base cache (#6677)
• cb2faa7 fix(prebuilt): support generic type arguments for ToolRuntime injection (#6509)
• a5827c5 fix: change default recursion limit (#6676)
• 5212369 feat(sdk-py): add end-time to crons client (#6674)
• 7045a23 fix: add state attribute to ToolCallRequest overrides (#6668)
• 728db10 fix: suppress unintended deprecation warning (#6669)
• 454af21 feat(sdk-py): cron.on_run_completed support (#6662)
• b4630d8 chore: delete docs (#6488)
• 311465b fix: sanitize namespace for deeply nested graph jumps (#6665)
• 8ccead9 docs: x-refs and explainer in tool node docs (#6653)
• Additional commits viewable in compare view