feat(oraclemcp): enterprise Oracle Net auth adapters — Kerberos/RADIU… #27

Job	Run time
cargo test	2m 59s
corpus license check	22s
cargo deny + audit	27s
oraclemcp boundary lint (one-way dependency)	4s
demo-no-db (hero-diff golden gate)	28s
cargo bench --no-run	3m 0s
parse-success (parser tests)	22s
classifier fuzz target builds (nightly)	2m 8s
rustfmt	15s
plan-lint (structural integrity)	19s
lab-gate (corpus/lab goldens, PR-blocking)	24s
clippy (-D warnings)	2m 12s
	13m 0s

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