quantum phase 3: add KeyVault lifecycle UX and read-path compatibility — introduces cast quantum subcommand group (bootstrap / add-key / remove-key / update-key-auth) that reuses the shared CastTxBuilder + ML-DSA signing pipeline, routes through `Quan#4
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…y — introduces `cast quantum` subcommand group (bootstrap / add-key / remove-key / update-key-auth) that reuses the shared `CastTxBuilder` + ML-DSA signing pipeline, routes through `QuantumWriteRequestV1`, and auto-applies `QUANTUM_LIFECYCLE_GAS_FLOOR`; distinguishes `--auth-key-id` (signer lane) from `--target-key-id` (key entry mutated). Adds shared `sol!`-backed KeyVault lifecycle calldata builders in `foundry-common` with byte-matched Phase 0 selector tests. Preserves `cast call` behavior for ordinary read paths while failing closed on all four lifecycle selectors with the frozen unsupported-simulation error. Moves CLI-policy lifecycle rejection out of the shared write-request validator (blocked `cast quantum` from signing its own legitimate payloads) into the `cast send` pre-build guard only.
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