perf(spanner): support inline-begin for TransactionRunner (step 7)#5326

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olavloite wants to merge 21 commits intogoogleapis:mainfrom

olavloite:spanner-inline-begin-tx-step-7

Commits on Apr 1, 2026

perf(spanner): inline BeginTransaction with first query (step 1)
olavloite
committed

Commits on Apr 2, 2026

perf(spanner): inline begin transaction error handling
olavloite
committed
test(spanner): add integration test for inline-begin error handling
olavloite
committed

Commits on Apr 3, 2026

perf(spanner): support concurrent queries with inline-begin-transaction
olavloite
committed

Commits on Apr 4, 2026

fix(spanner): prevent deadlock if ResultSet#next() is never called
olavloite
committed

Commits on Apr 5, 2026

Commits on Apr 8, 2026