feat(sessions): support session expiry in VertexAiSessionService - #369
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`VertexAiSessionService` now takes a `sessionTtl` applied to every session it creates, including the ones a runner creates through the `SessionService` interface, where a per-call argument cannot reach. A Vertex-only `createSession` overload additionally takes `ttl` or `expireTime` for one session, overriding that default. At most one expiry may be set, since the wire field is a single choice. Without one the backend applies its own default, which is long; with one, the minimum it accepts is 24 hours. The `SessionService` interface is unchanged. PiperOrigin-RevId: 970575360
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feat(sessions): support session expiry in VertexAiSessionService
VertexAiSessionServicenow takes asessionTtlapplied to every session itcreates, including the ones a runner creates through the
SessionServiceinterface, where a per-call argument cannot reach. A Vertex-only
createSessionoverload additionally takes
ttlorexpireTimefor one session, overridingthat default.
At most one expiry may be set, since the wire field is a single choice. Without
one the backend applies its own default, which is long; with one, the minimum it
accepts is 24 hours. The
SessionServiceinterface is unchanged.