fix(storage): add samples for bucket encryption encoforcement config (#16045)

impl(rest): improve http header representation (#16058)

impl(bigtable): simplify adding channels in dynamic channel pool (#16057)

impl(bigtable): make dynamic pool options available and update integration tests (#16056)

chore: update googleapis SHA circa 2026-03-24 (#16053)

impl(bigtable): update stub_factory and connection creation functions for dynamic pool (#16052)

chore: fix product neutral guides name (#16051)

impl(bigtable): update DataConnectionImpl to use StubManager (#16050)

impl(bigtable): add RandomTwoLeastUsed stub decorator (#16049)

impl(bigtable): add remaining methods to DynamicChannelPool (#16048)

impl(bigtable): change from time weighted average to instant count (#16047)

impl(testing_util): include algorithm header (#16044)

impl(bigtable): adds the DynamicChannelPool class and implements some methods (#16039)

chore: version bump to 3.4.0-rc (#16043)

docs(release): update changelog for the 2026-03 release (#16042)