Fix partition date regex in shredder_per_job_stats and add job type column (#8605)

Author: BenWu

sql/moz-fx-data-shared-prod/monitoring_derived/shredder_per_job_stats_v1/backfill.yaml

@@ -0,0 +1,11 @@
+2025-12-12:
+  start_date: 2025-10-15
+  end_date: 2025-12-12
+  reason: regex fix
+  watchers:
+  - [email protected]
+  status: Initiate
+  shredder_mitigation: false
+  override_retention_limit: false
+  override_depends_on_past_end_date: false
+  ignore_date_partition_offset: false

sql/moz-fx-data-shared-prod/monitoring_derived/shredder_per_job_stats_v1/query.sql

@@ -2,7 +2,7 @@ SELECT
   -- task id example: project.dataset.table_v1$20240102__sample_10
   SAFE.PARSE_DATE(
     "%Y%m%d",
-    REGEXP_EXTRACT(task_id, r"\$([0-9]{8})(?:__sample_[0-9]+)?$")
+    REGEXP_EXTRACT(task_id, r"\$([0-9]{8})(?:__sample_[0-9_]+)?$")
   ) AS partition_date,
   task_id,
   shredder_state.job_id,
@@ -26,6 +26,7 @@ SELECT
   SAFE_CAST(REGEXP_EXTRACT(task_id, r"__sample_([0-9]+)(?:_[0-9]+)?") AS INT) AS shredded_sample_id,
   shredder_jobs.error_result.reason AS error_reason,
   shredder_jobs.error_result.message AS error_message,
+  shredder_jobs.job_type,
 FROM
   `moz-fx-data-shredder.shredder_state.shredder_state` AS shredder_state
 INNER JOIN

sql/moz-fx-data-shared-prod/monitoring_derived/shredder_per_job_stats_v1/schema.yaml

@@ -53,3 +53,7 @@ fields:
 - name: error_message
   type: STRING
   mode: NULLABLE
+- name: job_type
+  type: STRING
+  mode: NULLABLE
+  description: BigQuery job type, should be one of 'QUERY' or 'COPY'