Add reserved threads and 10 missing showplan XML attributes

[erikdarlingdata]

Summary

• Properties panel now shows Reserved Threads, Inactive Threads, and per-node reservation breakdown in Thread Stats section
• Wait stats bar column uses fixed width (316px) instead of Star for proper duration text alignment
• Added parsing and display for 10 missing showplan XML attributes identified by XSD audit:
  1. QueryPlan.MemoryGrant — top-level memory grant value
  2. GuessedSelectivity — flags optimizer selectivity guesses on predicates
  3. UnmatchedIndexes — unmatched index detail text
  4. ForeignKeyReferencesCount — foreign key reference check count
  5. NoMatchingIndexCount — no matching index count
  6. PartialMatchingIndexCount — partial matching index count
  7. ConstantScan.Values — actual row values in constant scans
  8. StmtUseDb.Database — database name from USE statements
  9. SpillOccurred.Detail — spill occurred boolean flag
  10. UDX.UsedUDXColumns — CLR aggregate columns

Changes synced from plan-b to both Dashboard and Lite (6 files, models + parser + properties display each).

Test plan

• Build Dashboard and Lite with 0 errors
• Open a plan with parallelism — verify Reserved/Inactive Threads appear in Thread Stats
• Wait stats duration text aligned next to bars (not pushed to far right)
• Open plans with various operators to verify new attribute display

🤖 Generated with Claude Code