ate: expand kWrappedSeedMaxSize to 2048 bytes for Hybrid HPKE RMA seeds - #331
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Define explicit component size enum constants in ate_api.h for the two-layer Hybrid HPKE wrapped RMA token seed: - kRsa3072CiphertextSize = 384 (Layer 1 RSA-3072 wrapped seed) - kMlkem768CiphertextSize = 1088 (FIPS 203 ML-KEM-768 ciphertext) - kEcdhP256PubKeySize = 65 (uncompressed P-256 ephemeral public key) - kAesGcmTagSize = 16 (AES-256-GCM authentication tag) Compute kWrappedSeedMaxSize as their exact sum (1553 bytes). Ref: lowRISC#310 (TASK-3)
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Expand kWrappedSeedMaxSize in ate_api.h from 384 to 2048 bytes to accommodate two-layer Hybrid HPKE wrapped RMA token seeds (ML-KEM-768 + ECDH P-256 + AES-GCM).
Ref: #310 (TASK-3)