Validate matrix storage before CBLAS dispatch

[ulises-jeremias]

Summary

• Validate output and input dimensions, leading strides, and storage lengths before the CBLAS sgemm call.
• Delegate invalid inputs to the existing pure V implementation so its documented panics and edge semantics remain consistent.

Validation

• Pure V BLAS tests pass.
• CBLAS-tagged BLAS tests pass using the system CBLAS library.
• CBLAS-tagged shared module check passes.
• Formatting and diff checks pass.

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Reviewing files that changed from the base of the PR and between 94f3e29 and 9304197.

📒 Files selected for processing (1)

• blas/oblas_d_vsl_blas_cblas.v

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