Optimize imaging spectrum bin accumulation

[YukiMatsuzawa]

Summary

• replace repeated ContainsKey/indexer lookups with a single TryGetValue in the imaging spectrum binning hot path
• preserve existing binning and maximum-intensity behavior

Performance rationale

Each incoming peak previously performed a dictionary membership lookup and then additional indexer lookups. The new code performs one lookup and reuses the retrieved bin, reducing hash-table work and indexer overhead for every accumulated peak.

Performance improvement candidates identified

1. Imaging spectrum bin accumulation — implemented; highest impact/lowest effort.
2. Spectrum viewer drag-drop membership — use a keyed set for repeated DisplayScans.Contains checks.
3. MSDIAL5 peak conversion — avoid sorting all MS2 spectra when acquisition mode only needs a bounded window.
4. Normalized MS2 filtering — combine max-intensity calculation and filtering into one pass where semantics permit.
5. Deisotoping output ordering — avoid a second sort when isotope estimation already provides ordered peak IDs.
6. Chromatogram peak feature materialization — remove unnecessary ToList before consumers that accept enumerables.
7. Raw spectrum export — stream transformed results instead of eagerly materializing arrays.
8. Library peptide ordering — cache sorted peptide results for repeated access.
9. Spot annotation grouping — build lookup dictionaries once and reuse them across chart refreshes.
10. Imaging feature element construction — avoid duplicate projection/materialization across equivalent processing paths.

Validation

• Focused DataAccessTests passed.
• MsdialCore build passed after restore; restore reported existing package vulnerability/compatibility warnings.