Add Formula Library ratings, Job Profitability report, and Quote Revision History improvements

- Formula Library ratings: thumbs up/down per company per formula; toggle on/off; sorts by net score; own formulas not rateable; FormulaLibraryRating entity + migration AddFormulaLibraryRatings
- Job Profitability report: actual labor cost (logged hours x StandardLaborRate) vs powder cost vs billed price per job; gross margin % color-coded; time-tracked-only filter; totals footer
- Quote Revision History: track Total price changes on every save; log Sent/Resent events with recipient email; replace flat table with grouped timeline UI (icons per event type, total-change badge on header)
- Setup Wizard: cap CompletedCount at TotalSteps so old 10-step data no longer shows 10/5
- Formula Library card: fix badge overflow on long titles; add Rate: label to make voting buttons discoverable
- Help docs and AI knowledge base updated for all three features

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Application/DTOs/Company/FormulaLibraryDtos.cs

@@ -26,6 +26,15 @@ public class FormulaLibraryCardDto
 
     /// <summary>True when this formula was shared by the current browsing company.</summary>
     public bool IsOwnFormula { get; set; }
+
+    /// <summary>Total thumbs-up votes across all companies.</summary>
+    public int ThumbsUp { get; set; }
+
+    /// <summary>Total thumbs-down votes across all companies.</summary>
+    public int ThumbsDown { get; set; }
+
+    /// <summary>The current browsing company's vote: true = up, false = down, null = no vote.</summary>
+    public bool? MyVote { get; set; }
 }
 
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