Add SRM-Joint-AOL v1 model

Forked from HRM ACT framework. Replaces dual H_level/L_level transformer
stacks with a single joint operator T(h, l) that is provably contractive
under weighted P-norm with Lip_P(T) ≤ (1-α) + α·κ < 1.

Per-step Lyapunov bound: λ_1 ≤ log((1-α) + α·κ).
With κ=0.86 → λ_1 ≤ -0.15 ≈ HRM success regime (no CF needed).

Components:
- AOLLinear: 1-Lipschitz via Prach & Lampert rescaling (float32 normalization)
- AOLBlock: stack with ReLU (1-Lipschitz activation)
- CayleyOrthogonal: exact orthogonal cross-coupling
- BlockGain: softmax row-sum bound under P-norm
- AOLTokenMixer: 1-Lipschitz token + channel mixing

Smoke test passes: params=939k (hidden=256 test config),
forward OK, empirical Lip=0.17 < theoretical bound 0.90.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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