feat: Add initial AuthzQuerier implementation (#5919)

feat: Add initial AuthzQuerier implementation
- Adds package database/dbauthz that adds a database.Store implementation where each method goes through AuthZ checks
- Implements all database.Store methods on AuthzQuerier
- Updates and fixes unit tests where required
- Updates coderd initialization to use AuthzQuerier if codersdk.ExperimentAuthzQuerier is enabled

coderd/workspaceagents.go

@@ -26,6 +26,7 @@ import (
 	"cdr.dev/slog"
 	"github.com/coder/coder/agent"
 	"github.com/coder/coder/coderd/database"
+	"github.com/coder/coder/coderd/database/dbauthz"
 	"github.com/coder/coder/coderd/gitauth"
 	"github.com/coder/coder/coderd/httpapi"
 	"github.com/coder/coder/coderd/httpmw"
@@ -625,14 +626,29 @@ func (api *API) workspaceAgentCoordinate(rw http.ResponseWriter, r *http.Request
 		// inactive disconnect timeout we ensure that we don't block but
 		// also guarantee that the agent will be considered disconnected
 		// by normal status check.
-		ctx, cancel := context.WithTimeout(api.ctx, api.AgentInactiveDisconnectTimeout)
+		//
+		// Use a system context as the agent has disconnected and that token
+		// may no longer be valid.
+		//nolint:gocritic
+		ctx, cancel := context.WithTimeout(dbauthz.AsSystem(api.ctx), api.AgentInactiveDisconnectTimeout)
 		defer cancel()
 
 		disconnectedAt = sql.NullTime{
 			Time:  database.Now(),
 			Valid: true,
 		}
-		_ = updateConnectionTimes(ctx)
+		err := updateConnectionTimes(ctx)
+		if err != nil {
+			// This is a bug with unit tests that cancel the app context and
+			// cause this error log to be generated. We should fix the unit tests
+			// as this is a valid log.
+			if !xerrors.Is(err, context.Canceled) {
+				api.Logger.Error(ctx, "failed to update agent disconnect time",
+					slog.Error(err),
+					slog.F("workspace", build.WorkspaceID),
+				)
+			}
+		}
 		api.publishWorkspaceUpdate(ctx, build.WorkspaceID)
 	}()
 
@@ -907,7 +923,7 @@ func (api *API) workspaceAgentReportStats(rw http.ResponseWriter, r *http.Reques
 		slog.F("payload", req),
 	)
 
-	activityBumpWorkspace(api.Logger.Named("activity_bump"), api.Database, workspace.ID)
+	activityBumpWorkspace(ctx, api.Logger.Named("activity_bump"), api.Database, workspace.ID)
 
 	payload, err := json.Marshal(req)
 	if err != nil {