feat(oraclemcp): custom-tool catalog — first-class + oracle_run_named… #15

Job	Run time
rustfmt	14s
oraclemcp boundary lint (one-way dependency)	5s
cargo test	3m 12s
parse-success (parser tests)	28s
lab-gate (corpus/lab goldens, PR-blocking)	24s
cargo bench --no-run	3m 12s
classifier fuzz target builds (nightly)	2m 4s
plan-lint (structural integrity)	17s
demo-no-db (hero-diff golden gate)	24s
cargo deny + audit	21s
clippy (-D warnings)	2m 3s
corpus license check	17s
	13m 1s

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