Enhance Tender Management with Company-Based Matching and API Updates

- Updated the tender service to include company-based matching for tenders, allowing for more relevant results based on company CPV codes.
- Modified the ListTenders endpoint to accept a company ID parameter for calculating match percentages and sorting tenders accordingly.
- Refactored the tender response structure to include match percentage and days until deadline for better client-side handling.
- Updated API documentation to reflect changes in the tender listing functionality and added new endpoints for public tender access.
- Removed deprecated customer-related methods and streamlined customer listing functionality for improved clarity and performance.

internal/tender/entity.go

@@ -416,3 +416,62 @@ func (s *ScrapingState) MarkAsCompleted(year, number int) {
 	s.NextRunAt = time.Now().Add(4 * time.Hour).Unix() // Schedule next run in 4 hours
 	s.UpdatedAt = time.Now().Unix()
 }
+
+// CalculateMatchPercentage calculates the match percentage between tender classifications and company CPV codes
+func (t *Tender) CalculateMatchPercentage(companyCPVCodes []string) int {
+	if len(companyCPVCodes) == 0 {
+		return 0
+	}
+
+	mainMatch := false
+	additionalMatch := false
+
+	// Check if main classification matches any company CPV codes
+	if t.MainClassification != "" {
+		for _, companyCode := range companyCPVCodes {
+			if companyCode == t.MainClassification {
+				mainMatch = true
+				break
+			}
+		}
+	}
+
+	// Check if any additional classification matches any company CPV codes
+	if len(t.AdditionalClassifications) > 0 {
+		for _, additionalCode := range t.AdditionalClassifications {
+			for _, companyCode := range companyCPVCodes {
+				if companyCode == additionalCode {
+					additionalMatch = true
+					break
+				}
+			}
+			if additionalMatch {
+				break
+			}
+		}
+	}
+
+	// Calculate percentage based on matches
+	if mainMatch && additionalMatch {
+		return 100
+	} else if mainMatch || additionalMatch {
+		return 50
+	}
+	return 0
+}
+
+// GetDaysUntilDeadline returns the number of days until the tender deadline
+func (t *Tender) GetDaysUntilDeadline() int {
+	if t.TenderDeadline == 0 {
+		return 0
+	}
+
+	now := time.Now().UnixMilli()
+	if t.TenderDeadline <= now {
+		return 0 // Already expired
+	}
+
+	diffMillis := t.TenderDeadline - now
+	diffDays := diffMillis / (24 * 60 * 60 * 1000)
+	return int(diffDays)
+}