Tasks: using std::chrono ::steady_clock::time_point instead of millis

[PBrunot]

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[github-actions]

Firmware size changes for esp32-devboard

Commit CURRENT 09634a5 vs REFERENCE dbfe19b

<CURRENT> MAP file: ../firmware.map.latest
<REFERENCE> MAP file: ../firmware.map.previous
Difference is counted as <CURRENT> - <REFERENCE>,           i.e. a positive number means that <CURRENT> is larger.
Total sizes of <CURRENT>:                                       <REFERENCE>     Difference
Used static DRAM:   53696 bytes (  70884 remain, 43.1% used)          53696                (     +0 remain,      +0 total)
      .data size:   21096 bytes                                       21096
      .bss  size:   32600 bytes                                       32600
Used static IRAM:   70310 bytes ( 101722 remain, 40.9% used)          70310                (     +0 remain,      +0 total)
      .text size:   69283 bytes                                       69283
   .vectors size:    1027 bytes                                        1027
Used Flash size :  932359 bytes                                      930819          +1540
           .text:  800619 bytes                                      799331          +1288
         .rodata:  131484 bytes                                      131232           +252
Total image size: 1023765 bytes (.bin may be padded larger)         1022225          +1540

[github-actions]

Firmware size changes for hardware-rev0-it_IT

Commit CURRENT 09634a5 vs REFERENCE dbfe19b

<CURRENT> MAP file: ../firmware.map.latest
<REFERENCE> MAP file: ../firmware.map.previous
Difference is counted as <CURRENT> - <REFERENCE>,           i.e. a positive number means that <CURRENT> is larger.
Total sizes of <CURRENT>:                                       <REFERENCE>     Difference
Used static IRAM:   16383 bytes (      1 remain, 100.0% used)          16383                (     +0 remain,      +0 total)
      .text size:   15356 bytes                                       15356
   .vectors size:    1027 bytes                                        1027
Used stat D/IRAM:   83359 bytes ( 262497 remain, 24.1% used)          83359                (     +0 remain,      +0 total)
      .data size:   16436 bytes                                       16436
      .bss  size:   31360 bytes                                       31360
      .text size:   35563 bytes                                       35563
Used Flash size :  938051 bytes                                      936299          +1752
           .text:  802779 bytes                                      801279          +1500
         .rodata:  135016 bytes                                      134764           +252
Total image size: 1006433 bytes (.bin may be padded larger)         1004681          +1752