[CameronBrooks11]

docs(bench): add the 2026-11-07 speed and position record

Adds the 2026-11-07 bench record for #116 on a gen2 Nano Every with
both motors and 848-count encoders, from main at c276d88.

Passed:

• Open-loop sweeps gave M1 static 10, 2.024 RPM per PWM and M2 static
  7, 2.005, sent with SET_SPEED_FF (trim 20). A 4-byte payload was
  refused.
• Closed-loop speed at +10, -60, +120 and -150 RPM on each motor:
  within 5 % at 0.22-0.23 s, and the last-5 s means within 0.4 RPM of
  the target.
• A 0.5 s grip at 60 RPM recovered in 0.2 s with no fault; entry from
  -255 into +60 RPM never drove backwards (PWM 39-41, Entering closed-loop speed starts from a stale servo target and encoder baseline #62).
• Both motors at 120 RPM for 5 minutes with GET_STATE every 100 ms: no
  lockup and no lease trip (fix(firmware): clear the TWI slave flags after a collision #109).

Findings:

• A -7282 -> 0 position move stopped at +48 with no drive for 60 s.
  DCMotorServo 2.0.1 (fix: zero the position integral while the drive is saturated dcmotorservo#30) fixes it; with the fix
  moves of 7282, 16000 and 20725 counts ended within 6 counts.
• 32 of 2968 polls (1.1 %) failed CRC with both motors running.
• A steady hand load on a held position latched M1_STALL within about
  a second (A position step just outside the deadband latches a stall #102).

Not checked: the saturated-hold case of the fix, M2 grip and entry,
#102's small step, and the analog builds on this board.