feat(ms): preserve mzML precursor and scan metadata

[nmrtist]

Summary

• import mzML precursor spectrum references, selected-ion metadata, isolation windows, collision energy, and activation methods
• retain per-scan acquisition metadata and expose it through Scientific Script snapshots
• prefer source TIC and base-peak summaries over values derived from profile arrays, while retaining summary provenance
• group spectra by MS level and polarity so alternating FTMS/ITMS MS1 scans remain in one chromatogram
• handle self-closing mzML precursor elements and preserve their source spectrum references
• align SCIEX WIFF and Waters mappings with the canonical spectrum model
• update the fixed v1 payload in place and synchronize English and zh-CN docs

Multiple precursors, selected ions, or scans produce explicit warnings while retaining the first supported value.

The HUPO-PSI small.mzML fixture imports as two streams containing 14 MS1 and 34 MS2 scans. Its MS1 TIC trace matches the file-supplied 14-point sequence, including the maximum at 0.285483 min / 22,136,832.

Validation

• cargo pr-check passed all six stages: fmt, Rust source size, dependency policy, default frontend check, Clippy with warnings denied, and test suite
• mzML tests: 20 passed
• real-file mzML importer and 14-point PlotX figure regression tests

pm run build from docs/: 75 pages passed