1.1.7a2

Changes since 1.1.7a1

• chore(deps): bump pytest from 9.0.2 to 9.0.3 in /libs/langgraph (#7507)
• release(langgraph): 1.1.7a2 (#7511)
• chore: allow passing some metadata only for tracing purposes (#7383)
• fix: populate assistant_id from config configurable instead of metadata (#7468)