Expose FFI runtime worker pool control #33877

Job	Run time
Python (test)	2m 15s
lint-toml	8s
measurement_id golden vectors	14s
validate-workflow-yaml	7s
Check generated source files are up to date	37s
License Check and Audit Check (bans licenses sources)	50s
Rust build (with tokio dispatcher)	43s
C API test build	35s
Python (lint)	38s
WASM integration smoke test	28s
Java	2m 29s
License Check and Audit Check (advisories)	50s
C++ API	2m 1s
Check build with minimal dependencies	2m 9s
Rust build (all-features)	2m 32s
Python CUDA (test)	5m 50s
Rust build (default features)	2m 33s
Rust build (wasm32 with default features)	58s
Rust (btrblocks golden corpus)	29s
C/C++ (lint)	9s
Rust (lint, no default)	2m 39s
Mirror DuckDB to R2 / Resolve DuckDB version and check R2	5s
DuckDB libraries available in R2	2s
Mirror DuckDB to R2 / Mirror DuckDB ${{ matrix.archive }} to R2	-1s
SQL logic tests	3m 3s
Rust (lint)	2m 7s
Rust tests (linux-arm64)	4m 17s
Rust (docs)	2m 17s
Rust tests (windows-x64)	7m 24s
	48m 28s

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