Revert #325 (zspace / ZGamma, FidelityReport z accessors, moments_u32 / observe_batch)

[AdaWorldAPI]

What

A 1:1 revert of #325, made with git revert -m 1 e378938. It is one commit, and it touches no other code.

After this revert, the tree is byte-identical to 2c91538, the master state just before #325 merged. git diff 2c91538 HEAD is empty. The diff is the exact mirror of #325: 7 files, +1 / −960.

Removed

• src/hpc/zspace.rs: ZGamma, ln_det, fisher_z, hyperbolic_depth, hamming_null_z, and the golden digests.
• pub mod zspace from src/hpc/mod.rs.
• FidelityReport::{pearson_z, spearman_z, cosine_z} from src/hpc/reliability.rs.
• moments_u32 / MomentsU32 from src/hpc/statistics.rs.
• Cascade::observe_batch from src/hpc/cascade.rs.
• The re-exports of the above from src/simd.rs.
• The ZGamma golden check in crates/wasm-simd-parity/src/lib.rs.

Verification

• git diff 2c915389e2a4d9b9048b3546f4a8964c90956fbc HEAD is empty.

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📥 Commits

Reviewing files that changed from the base of the PR and between e378938 and 8c07a54.

📒 Files selected for processing (7)

• crates/wasm-simd-parity/src/lib.rs
• src/hpc/cascade.rs
• src/hpc/mod.rs
• src/hpc/reliability.rs
• src/hpc/statistics.rs
• src/hpc/zspace.rs
• src/simd.rs

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