Enhance Tender Approval Filtering with Created Date Parameters

- Added new query parameters `created_from` and `created_to` to the tender approval endpoints for filtering by creation date using Unix timestamps.
- Updated the `GetByCompanyID` method in the repository and service layers to support the new filtering options.
- Modified the handler methods to parse and pass the new parameters, improving the flexibility of tender approval retrieval.
- Updated API documentation to reflect the new query parameters, ensuring clarity for API consumers.

internal/tender_approval/handler.go

@@ -131,6 +131,8 @@ func (h *Handler) GetTenderApprovalByTenderAndCompany(c echo.Context) error {
 // @Produce json
 // @Param submission_mode query string false "Filter by submission mode Enums(self-apply, partnership)"
 // @Param status query string false "Filter by status Enums(submitted, rejected)"
+// @Param created_from query integer false "Filter by created date from (Unix timestamp)"
+// @Param created_to query integer false "Filter by created date to (Unix timestamp)"
 // @Success 200 {object} response.APIResponse{data=[]TenderApprovalWithTenderResponse} "Tender approvals retrieved successfully"
 // @Failure 400 {object} response.APIResponse "Bad request - Invalid company ID"
 // @Failure 500 {object} response.APIResponse "Internal server error"
@@ -166,7 +168,21 @@ func (h *Handler) PublicGetTenderApprovals(c echo.Context) error {
 		status = &statusVal
 	}
 
-	tenderApprovalsWithTender, err := h.service.GetTenderApprovalsByCompanyIDWithTender(c.Request().Context(), companyID, submissionMode, status)
+	var from *int64
+	if fromParam := c.QueryParam("created_from"); fromParam != "" {
+		if parsed, err := strconv.ParseInt(fromParam, 10, 64); err == nil {
+			from = &parsed
+		}
+	}
+
+	var to *int64
+	if toParam := c.QueryParam("created_to"); toParam != "" {
+		if parsed, err := strconv.ParseInt(toParam, 10, 64); err == nil {
+			to = &parsed
+		}
+	}
+
+	tenderApprovalsWithTender, err := h.service.GetTenderApprovalsByCompanyIDWithTender(c.Request().Context(), companyID, submissionMode, status, from, to)
 	if err != nil {
 		return response.InternalServerError(c, "Failed to get tender approvals")
 	}