feat: implement runtime configuration package with multi-org support (#14624)

runtime configuration package
---------

Signed-off-by: Danny Kopping <danny@coder.com>
Co-authored-by: Danny Kopping <danny@coder.com>

coderd/database/dbmem/dbmem.go

@@ -84,6 +84,7 @@ func New() database.Store {
 			workspaceProxies:          make([]database.WorkspaceProxy, 0),
 			customRoles:               make([]database.CustomRole, 0),
 			locks:                     map[int64]struct{}{},
+			runtimeConfig:             map[string]string{},
 		},
 	}
 	// Always start with a default org. Matching migration 198.
@@ -194,6 +195,7 @@ type data struct {
 	workspaces                    []database.Workspace
 	workspaceProxies              []database.WorkspaceProxy
 	customRoles                   []database.CustomRole
+	runtimeConfig                 map[string]string
 	// Locks is a map of lock names. Any keys within the map are currently
 	// locked.
 	locks                            map[int64]struct{}
@@ -1928,6 +1930,14 @@ func (q *FakeQuerier) DeleteReplicasUpdatedBefore(_ context.Context, before time
 	return nil
 }
 
+func (q *FakeQuerier) DeleteRuntimeConfig(_ context.Context, key string) error {
+	q.mutex.Lock()
+	defer q.mutex.Unlock()
+
+	delete(q.runtimeConfig, key)
+	return nil
+}
+
 func (*FakeQuerier) DeleteTailnetAgent(context.Context, database.DeleteTailnetAgentParams) (database.DeleteTailnetAgentRow, error) {
 	return database.DeleteTailnetAgentRow{}, ErrUnimplemented
 }
@@ -3505,6 +3515,18 @@ func (q *FakeQuerier) GetReplicasUpdatedAfter(_ context.Context, updatedAt time.
 	return replicas, nil
 }
 
+func (q *FakeQuerier) GetRuntimeConfig(_ context.Context, key string) (string, error) {
+	q.mutex.Lock()
+	defer q.mutex.Unlock()
+
+	val, ok := q.runtimeConfig[key]
+	if !ok {
+		return "", sql.ErrNoRows
+	}
+
+	return val, nil
+}
+
 func (*FakeQuerier) GetTailnetAgents(context.Context, uuid.UUID) ([]database.TailnetAgent, error) {
 	return nil, ErrUnimplemented
 }
@@ -9187,6 +9209,19 @@ func (q *FakeQuerier) UpsertProvisionerDaemon(_ context.Context, arg database.Up
 	return d, nil
 }
 
+func (q *FakeQuerier) UpsertRuntimeConfig(_ context.Context, arg database.UpsertRuntimeConfigParams) error {
+	err := validateDatabaseType(arg)
+	if err != nil {
+		return err
+	}
+
+	q.mutex.Lock()
+	defer q.mutex.Unlock()
+
+	q.runtimeConfig[arg.Key] = arg.Value
+	return nil
+}
+
 func (*FakeQuerier) UpsertTailnetAgent(context.Context, database.UpsertTailnetAgentParams) (database.TailnetAgent, error) {
 	return database.TailnetAgent{}, ErrUnimplemented
 }