fix(bitbucket): handle microsecond precision timestamps in PR extractor (#8828)

Bitbucket Cloud returns timestamps with 6-digit fractional seconds
(e.g. 2025-09-15T08:53:36.337932+00:00). Changed BitbucketCreatedAt/
BitbucketUpdatedAt from time.Time to *common.Iso8601Time and added
microsecond format to DateTimeFormats.

Fixes #8708

Co-authored-by: Vincenzo Baldi <vincenzobaldi@a-m-j-v-baldi.fritz.box>

Author: vincio71

backend/core/models/common/iso8601time.go

@@ -56,6 +56,10 @@ func init() {
 			Matcher: regexp.MustCompile(`[+-][\d]{4}$`),
 			Format:  "2006-01-02T15:04:05-0700",
 		},
+		{
+			Matcher: regexp.MustCompile(`[\d]{6}[+-][\d]{2}:[\d]{2}$`),
+			Format:  "2006-01-02T15:04:05.000000-07:00",
+		},
 		{
 			Matcher: regexp.MustCompile(`[\d]{3}[+-][\d]{2}:[\d]{2}$`),
 			Format:  "2006-01-02T15:04:05.000-07:00",

backend/core/models/common/iso8601time_test.go

@@ -145,6 +145,18 @@ func TestConvertStringToTime(t *testing.T) {
 			output: time.Date(2023, 3, 1, 0, 0, 0, 0, time.UTC),
 			err:    nil,
 		},
+		{
+			name:   "Valid time string with milliseconds",
+			input:  "2025-09-15T08:53:36.337+00:00",
+			output: time.Date(2025, 9, 15, 8, 53, 36, 337000000, time.UTC),
+			err:    nil,
+		},
+		{
+			name:   "Valid time string with microseconds (Bitbucket Cloud format)",
+			input:  "2025-09-15T08:53:36.337932+00:00",
+			output: time.Date(2025, 9, 15, 8, 53, 36, 337932000, time.UTC),
+			err:    nil,
+		},
 		{
 			name:   "Invalid time string",
 			input:  "invalid",

backend/plugins/bitbucket/tasks/pr_extractor.go

@@ -19,7 +19,6 @@ package tasks
 
 import (
 	"encoding/json"
-	"time"
 
 	"github.com/apache/incubator-devlake/core/errors"
 	"github.com/apache/incubator-devlake/core/models/common"
@@ -57,8 +56,8 @@ type BitbucketApiPullRequest struct {
 	} `json:"links"`
 	ClosedBy           *BitbucketAccountResponse `json:"closed_by"`
 	Author             *BitbucketAccountResponse `json:"author"`
-	BitbucketCreatedAt time.Time                 `json:"created_on"`
-	BitbucketUpdatedAt time.Time                 `json:"updated_on"`
+	BitbucketCreatedAt *common.Iso8601Time       `json:"created_on"`
+	BitbucketUpdatedAt *common.Iso8601Time       `json:"updated_on"`
 	BaseRef            *struct {
 		Branch struct {
 			Name string `json:"name"`
@@ -174,8 +173,8 @@ func convertBitbucketPullRequest(pull *BitbucketApiPullRequest, connId uint64, r
 		Url:                pull.Links.Html.Href,
 		Type:               pull.Type,
 		CommentCount:       pull.CommentCount,
-		BitbucketCreatedAt: pull.BitbucketCreatedAt,
-		BitbucketUpdatedAt: pull.BitbucketUpdatedAt,
+		BitbucketCreatedAt: pull.BitbucketCreatedAt.ToTime(),
+		BitbucketUpdatedAt: pull.BitbucketUpdatedAt.ToTime(),
 	}
 	if pull.BaseRef != nil {
 		if pull.BaseRef.Repo != nil {