sp_QuickieStore: add @find_parameter_sensitive mode

sp_QuickieStore/README.md

@@ -75,6 +75,7 @@ Use the `@expert_mode` parameter to return additional details.
 | @include_query_hash_totals             | bit            | will add an additional column to final output with total resource usage by query hash, may be skewed by query_hash and query_plan_hash bugs with forced plans/plan guides | 0 or 1                                                                                                                                                                                                                                                                                                                                                            | 0                                                                         |
 | @find_high_impact                      | bit            | finds the vital few queries consuming disproportionate resources across cpu, duration, reads, writes, memory, and executions                      | 0 or 1                                                                                                                                                                                                                                                                                                                                                            | 0                                                                         |
 | @primary_window                        | nvarchar       | with @find_high_impact, restricts results to queries whose majority activity is in this window (business, off-hours, or weekend)                  | business, off-hours, or weekend (any unambiguous prefix works: b, biz, off, overnight, w, wknd, etc.)                                                                                                                                                                                                                                                             | NULL                                                                      |
+| @find_parameter_sensitive              | bit            | finds plan shapes whose runtime metrics swing wildly across executions of the same plan: classic parameter sensitivity                            | 0 or 1                                                                                                                                                                                                                                                                                                                                                            | 0                                                                         |
 | @include_maintenance                   | bit            | Set this bit to 1 to add maintenance operations such as index creation to the result set                                                          | 0 or 1                                                                                                                                                                                                                                                                                                                                                            | 0                                                                         |
 | @log_to_table                          | bit            | enable logging to permanent tables instead of returning results                                                                                   | 0 or 1                                                                                                                                                                                                                                                                                                                                                            | 0                                                                         |
 | @log_database_name                     | sysname        | database to store logging tables                                                                                                                  | a valid database name                                                                                                                                                                                                                                                                                                                                             | NULL; current database                                                    |
@@ -120,6 +121,16 @@ EXECUTE dbo.sp_QuickieStore
     @regression_baseline_end_date = '2025-01-08',
     @regression_direction = 'regressed';
 
+-- Find the vital few queries consuming disproportionate resources
+EXECUTE dbo.sp_QuickieStore
+    @find_high_impact = 1;
+
+-- Find parameter sensitive plan shapes: same plan, wildly different runtimes.
+-- Results are one row per query_hash + query_plan_hash, ranked by how
+-- volatile the @sort_order metric is (coefficient of variation)
+EXECUTE dbo.sp_QuickieStore
+    @find_parameter_sensitive = 1;
+
 -- Expert mode for additional details
 EXECUTE dbo.sp_QuickieStore
     @expert_mode = 1;