feat(dynamicconfig): add operational dynamic config store properties

Adds four new dynamic config keys to control the polling cadence and
timeouts of the operational dynamic config store (added in a follow-up
commit):

- system.operationalConfigStorePollInterval        (Duration, default 2s)
- system.operationalConfigStoreFetchTimeout        (Duration, default 2s)
- system.operationalConfigStoreUpdateTimeout       (Duration, default 2s)
- system.operationalConfigStoreUpdateRetryAttempts (Int,      default 1)

The 2s default puts the operational store at the configstore client's
minimum poll interval (configStoreMinPollInterval), enabling sub-2s
regional convergence for safety-critical operational config that cannot
tolerate the convergence latency of a typical eventually-consistent
dynamic config system.

The store itself is added in the follow-up commit; defining the keys
first lets that commit wire them in without a placeholder defaults step.

Author: jakobht

common/dynamicconfig/dynamicproperties/constants.go

@@ -1641,6 +1641,13 @@ const (
 	// Allowed filters: DomainName, TaskListName
 	HistoryTaskListNiceValue
 
+	// OperationalConfigStoreUpdateRetryAttempts is the number of attempts
+	// to push a value to the operational dynamic config store on conflict.
+	// KeyName: system.operationalConfigStoreUpdateRetryAttempts
+	// Value type: Int
+	// Default value: 1
+	OperationalConfigStoreUpdateRetryAttempts
+
 	// LastIntKey must be the last one in this const group
 	LastIntKey
 )
@@ -3331,6 +3338,27 @@ const (
 	// Allowed filters: ShardID
 	HistoryTaskDLQProcessorInterval
 
+	// OperationalConfigStorePollInterval controls how often the operational
+	// dynamic config store re-reads its snapshot from the primary database.
+	// KeyName: system.operationalConfigStorePollInterval
+	// Value type: Duration
+	// Default value: 2 seconds
+	OperationalConfigStorePollInterval
+
+	// OperationalConfigStoreFetchTimeout is the per-call timeout used when
+	// fetching the operational dynamic config snapshot from the primary database.
+	// KeyName: system.operationalConfigStoreFetchTimeout
+	// Value type: Duration
+	// Default value: 2 seconds
+	OperationalConfigStoreFetchTimeout
+
+	// OperationalConfigStoreUpdateTimeout is the per-call timeout used when
+	// writing an operational dynamic config snapshot to the primary database.
+	// KeyName: system.operationalConfigStoreUpdateTimeout
+	// Value type: Duration
+	// Default value: 2 seconds
+	OperationalConfigStoreUpdateTimeout
+
 	// LastDurationKey must be the last one in this const group
 	LastDurationKey
 )
@@ -4534,6 +4562,11 @@ var IntKeys = map[IntKey]DynamicInt{
 		DefaultValue: 0,
 		Filters:      []Filter{DomainName, TaskListName},
 	},
+	OperationalConfigStoreUpdateRetryAttempts: {
+		KeyName:      "system.operationalConfigStoreUpdateRetryAttempts",
+		Description:  "Number of attempts to push a value to the operational dynamic config store on conflict",
+		DefaultValue: 1,
+	},
 }
 
 var BoolKeys = map[BoolKey]DynamicBool{
@@ -6004,6 +6037,21 @@ var DurationKeys = map[DurationKey]DynamicDuration{
 		Description:  "HistoryTaskDLQProcessorInterval is the interval for background processing of the History Task DLQ",
 		DefaultValue: time.Minute * 30,
 	},
+	OperationalConfigStorePollInterval: {
+		KeyName:      "system.operationalConfigStorePollInterval",
+		Description:  "How often the operational dynamic config store re-reads its snapshot from the primary database",
+		DefaultValue: time.Second * 2,
+	},
+	OperationalConfigStoreFetchTimeout: {
+		KeyName:      "system.operationalConfigStoreFetchTimeout",
+		Description:  "Per-call timeout for fetching the operational dynamic config snapshot from the primary database",
+		DefaultValue: time.Second * 2,
+	},
+	OperationalConfigStoreUpdateTimeout: {
+		KeyName:      "system.operationalConfigStoreUpdateTimeout",
+		Description:  "Per-call timeout for writing an operational dynamic config snapshot to the primary database",
+		DefaultValue: time.Second * 2,
+	},
 }
 
 var MapKeys = map[MapKey]DynamicMap{