Parallelize per-file analysis with rayon (issue #1474)

[miraclesonly]

Summary

#1474 — parallel processing
The issue's file pointer (tooling/sanctifier-cli/src/config.rs) doesn't exist anywhere in this
repo. The real "process multiple files concurrently" opportunity it describes is
analyze.rs's run_analysis(): a sequential for file_path in &rs_files loop running
RuleRegistry::run_all, analyze_ledger_size, and scan_storage_collisions per file — each
independent of the others. The file already had
#[allow(unused_imports)] use rayon::prelude::*; — rayon was already a declared dependency and
imported here, just never actually used.

Switched to rs_files.par_iter().filter_map(...), mirroring the Arc<Analyzer> + par_iter
pattern workspace.rs already uses for the identical shape of per-file work in this same crate.
registry/analyzer are now wrapped in Arc for read-only cross-thread sharing; each file's
(violations, size_warnings, collisions) are collected into a Vec first, then folded into the
existing totals sequentially afterward — avoids needing a Mutex around the shared counters,
and keeps the final output equivalent to the original sequential loop (aside from violation
ordering across files, which was never specified as significant).

Test plan

• cargo check (tooling/sanctifier-cli): passes cleanly. Full workspace build, ~2m49s.
  Only warning is a pre-existing, unrelated dead-code warning in sanctifier-core
  (expr_contains_verifier), not touched by this change.

Closes #1474

Closes #1476

Closes #1475

Closes #1478

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