chore: Fix no-unnecessary-condition linting errors

[gcko]

PR checklist

• Ensure you have added or ran the appropriate tests for your PR.
• DCO signed

What type of PR is this?

Chore

What this PR does / why we need it:

• Update pnpm to latest
• Fix @typescript-eslint/no-unnecessary-condition - 54 errors

Which issue(s) this PR fixes:

N/A

Special notes for your reviewer:

• ChangeSummary.tsx
  • Add better conditional logic, note that base.columns[col] is checked for existence, however the underlying typing does not include conditional existence
• CheckBreadcrumb.tsx
  • Add missing typing to useRef
  • Fix typing for event handlers
• CheckDetail.tsx
  • Check for window.isSecureContext (proper way to check)
• CheckList.tsx
  • Disable type check for this line (need to fix check.type typing)
• DropdownValuesInput.tsx
  • Correctly check for inputRef.current
• EnvInfo.tsx
  • Check if the object is empty rather than exists (it always exists)
• Filename.tsx
  • disable check for cloudMode
• formatters.tsx
  • Fix typing for topK
• graph.ts
  • visited record could be undefined
  • use != null check - idiomatic
• GraphNode.tsx
  • disable lint checks on data for now
• lineage.ts
  • Add TODO - LineageData typing needs to be fully thought out to handle the edge-cases
• LineageGraphContext.tsx
  • disable lineage check
• LineageViewTopBar.tsx
  • add missing type on useRef
• mergeKeys.ts
  • Add typing on Record to allow for undefined type
• PresetCheckRecommendation.tsx
  • disable lint check for querySelectModels
• profile.ts
  • Add undefined type for TopKResult
• ProfileDiffForm.tsx
  • Add proper logic for onChange
• QueryResultView.tsx
  • run.result can be undefined, use default type and treat it as such
• RecceActionContext.tsx
  • RunForm could be undefined
• RunView.tsx
  • Fix null type checking
• schema.test.ts
  • Fix typing (mergeColumns always returns truthy)
• schemaDiff.ts
  • Disable type checking
• SchemaSummary.tsx
  • Remove unused imports
• ScreenShot.tsx
  • Add missing type to useRef
• TopKSummaryList.tsx
  • Fix v typing, fix null type check
• useMultiNodesAction.ts
  • Disable checking on while(true)
• valuediff.tsx
  • disable checking on columnMap
• ValueDiffForm.tsx
  • Add proper logic for onChange
• ValueDiffResultView.tsx
  • fix typing

Does this PR introduce a user-facing change?:

NONE