DPL: allow --completion-policy <N>[s, m] to wait before quitting

[ktf]

In case of a completed processing, wait the specified number of seconds / minutes before quitting.

[alibuild]

Error while checking build/O2/fullCI_slc9 for 8295cec at 2026-04-25 00:04:

## sw/BUILD/O2-sim-challenge-test-latest/log
./sim-challenge.log[4715:internal-dpl-ccdb-backend]: [00:03:55][ERROR] CCDBDownloader CURL transfer error - Timeout was reached
./sim-challenge.log[4715:internal-dpl-ccdb-backend]: [00:03:55][ERROR] CcdbDownloader finished transfer http://alice-ccdb.cern.ch/GLO/Config/GRPECS for 1546300800000 (agent_id: o2-its-reco-wor/o2-its-reco-workflow@4715 target/Linux_x86_64 init/1777068219255 id/mesosci@alimetal02.cern.ch session/68ImE3ut) with http code: 0
./sim-challenge.log[4715:internal-dpl-ccdb-backend]: [00:03:55][ERROR] File GLO/Config/GRPECS could not be retrieved. No more hosts to try.
./sim-challenge.log[4715:internal-dpl-ccdb-backend]: [00:03:55][FATAL] Unable to find CCDB object GLO/Config/GRPECS/1546300800000
./sim-challenge.log[4715:internal-dpl-ccdb-backend]: [00:03:56][ERROR] Exception while running: Fatal error. Rethrowing.
./sim-challenge.log[4715:internal-dpl-ccdb-backend]: [00:03:56][FATAL] Unhandled o2::framework::runtime_error reached the top of main of o2-its-reco-workflow, device shutting down. Reason: Fatal error
./sim-challenge.log[ERROR] Workflow crashed - PID 4715 (internal-dpl-ccdb-backend) did not exit correctly however it's not clear why. Exit code forced to 128.
./sim-challenge.log[ERROR]  - Device internal-dpl-ccdb-backend: pid 4715 (exit 128)
./sim-challenge.log[INFO]    - First error: [00:03:55][FATAL] Unable to find CCDB object GLO/Config/GRPECS/1546300800000
./sim-challenge.log[ERROR] SEVERE: Device internal-dpl-ccdb-backend (4715) had at least one message above severity 7: Unable to find CCDB object GLO/Config/GRPECS/1546300800000
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/37}
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/38}
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/40}
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/42}
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/43}
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/45}
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/46}
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/47}
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/48}
./digi.log[ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/49}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/37}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/38}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/40}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/42}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/43}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/45}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/46}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/47}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/48}
./digi.log[1506:internal-dpl-ccdb-backend]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/49}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/37}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/38}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/40}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/42}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/43}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/45}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/46}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/47}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/48}
./digi.log[1651:TPCDigitizer_2]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/49}
./digi.log[1535:TRDDigitizer]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/37}
./digi.log[1535:TRDDigitizer]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/38}
./digi.log[1535:TRDDigitizer]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/40}
./digi.log[1535:TRDDigitizer]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/42}
./digi.log[1535:TRDDigitizer]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/43}
./digi.log[1535:TRDDigitizer]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/45}
./digi.log[1535:TRDDigitizer]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/46}
./digi.log[1535:TRDDigitizer]: [ERROR] Found duplicate input binding with different spec.:collisioncontext {SIM/COLLISIONCONTEXT/47}
[0 more errors; see full log]

Full log here.