Expose transport metadata on server contexts #2682

Job	Run time
checks / pre-commit	29s
checks / readme-snippets	16s
checks / test (3.10, lowest-direct, windows-latest)	1m 13s
checks / test (3.10, locked, windows-latest)	1m 13s
checks / test (3.10, locked, ubuntu-latest)	52s
checks / test (3.14, locked, ubuntu-latest)	1m 53s
checks / test (3.11, lowest-direct, ubuntu-latest)	55s
checks / test (3.10, lowest-direct, ubuntu-latest)	56s
checks / test (3.12, lowest-direct, windows-latest)	1m 22s
checks / test (3.11, locked, windows-latest)	1m 18s
checks / test (3.13, locked, windows-latest)	1m 18s
checks / test (3.12, locked, ubuntu-latest)	53s
checks / test (3.13, locked, ubuntu-latest)	43s
checks / test (3.12, lowest-direct, ubuntu-latest)	56s
checks / test (3.11, locked, ubuntu-latest)	51s
checks / test (3.12, locked, windows-latest)	1m 21s
checks / test (3.13, lowest-direct, windows-latest)	1m 19s
checks / test (3.13, lowest-direct, ubuntu-latest)	55s
checks / test (3.11, lowest-direct, windows-latest)	1m 20s
checks / test (3.14, lowest-direct, windows-latest)	1m 14s
checks / test (3.14, lowest-direct, ubuntu-latest)	46s
checks / test (3.14, locked, windows-latest)	2m 8s
all-green	3s
	24m 14s

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