feat(EvseManager)!: restructure charging state machine to simplify pause/resume and remove replug

[corneliusclaussen]

Describe your changes

Remove WaitingForEnergy, Replug states and related session events (ChargingResumed, ReplugStarted, ReplugFinished, WaitingForEnergy). Consolidate pause handling into ChargingPausedEVSE with reason tracking
(Error, NoEnergy, UserPause) via new PauseChargingEVSEReasonEnum.

Key changes in Charger state machine:

• Replace WaitingForEnergy state with direct transitions through ChargingPausedEVSE, which now reports multiple concurrent reasons
• Remove evse_replug command from BSP interface and all implementations
• Remove EvseReplugStarted/Finished events from board_support_common
• Add configurable hlc_charge_loop_without_energy_timeout_s for ISOsessions to handle no-energy scenarios gracefully in charge loop
• Add dc_ramp_ampere_per_second config for DC current ramping
• Change zero_power_ignore_pause default to true for better EV compatibility
• Introduce StoppingCharging as proper transitional state that waits for contactor open before moving to paused or finished states
• Use atomic flags (flag_authorized, flag_transaction_active, flag_ev_plugged_in, flag_paused_by_evse) for thread-safe state

BREAKING CHANGE: Removes WaitingForEnergy, ChargingResumed, ReplugStarted, ReplugFinished session events and evse_replug BSP command. Consumers must handle ChargingPausedEVSE with reason tracking instead.

Behavioral changes:

• EvseManager will set state F in case no EV is plugged in and EvseManager has an active error
• The default of zero_power_ignore_pause has been changed to true because this is more compatible with real EVs. With this configuration parameter being true DC sessions will reach the charge loop in case no energy is available before the session is stopped by the EVSE after hlc_charge_loop_without_energy_timeout_s
• In general EVerest attempts to be able/ready to restart/resume ISO15118 sessions whenever possible in case of errors, no energy or user pause

Smoke tests:

• Add pause/resume session commands to test controller interface
• Add comprehensive smoke tests for pause/resume and no-energy scenarios
• Remove deprecated startup_tests.py in favor of new probe-based tests

These changes have been verified within the following test scenarios with real EVs for basic charging, ISO15118-2 AC and DC

• No energy available at start of session
• No energy available during session
• User pause during session
• User resume during session
• Raise error before session
• Raise/clear error during session

NOTE: The main changes of this PR are located in Charger.cpp/hpp and EvseManager.cpp/hpp. Most of changes in the other files are due to the removed types, vars and interface commands.

Issue ticket number and link

Checklist before requesting a review

• I have performed a self-review of my code
• I have made corresponding changes to the documentation
• I read the contribution documentation and made sure that my changes meet its requirements

[FaHaGit]

evse_replug cmd is still in the EvseBoardSupport interface. Shouldn't we just remove it if no one is using it anymore?

[Pietfried]

evse_replug cmd is still in the EvseBoardSupport interface. Shouldn't we just remove it if no one is using it anymore?

Yes I guess we will eventually remove it. This PR is still an early draft

[Pietfried]

Regarding RpcApi, this looks okay, and is tested by us.

Some other small remarks and nits added.

The EvseManager changes are massive, and currently not fully understood, and not part of this review.

Regarding #1682: The EVSE cannot tell the EV to pause charging (EVSENotification does not allow for this differentiation). So now the EVSE tells the EV "StopCharging", and the EV terminates the session, which is probably as correct as it can be. Yet the EvseManager stays in "EVSE Paused" until unplugged:

2026-03-06 12:02:55.819276 [INFO] evse_manager:Ev  ::                                     CAR ISO V2G CurrentDemandReq
2026-03-06 12:02:55.950353 [INFO] evse_manager:Ev  :: EVSE ISO V2G CurrentDemandRes
2026-03-06 12:02:56.054472 [INFO] evse_manager:Ev  :: EVSE IEC Charger state: Charging->StoppingCharging
2026-03-06 12:02:56.228407 [INFO] evse_manager:Ev  ::                                     CAR ISO V2G CurrentDemandReq
2026-03-06 12:02:56.322909 [INFO] evse_manager:Ev  :: EVSE ISO V2G CurrentDemandRes
2026-03-06 12:02:56.395863 [INFO] ev_manager:EvMa  :: POWER OFF iso stopped
2026-03-06 12:02:56.566788 [INFO] ev_manager:EvMa  :: Finished simulation.
2026-03-06 12:02:56.894739 [INFO] evse_manager:Ev  ::                                     CAR IEC Event CarRequestedStopPower
2026-03-06 12:02:56.905597 [INFO] ovm:OVMSimulato  :: Over voltage monitoring: stopped.
2026-03-06 12:02:56.947046 [INFO] evse_manager:Ev  :: VoltagePlausibilityMonitor, stop monitoring
2026-03-06 12:02:56.947197 [INFO] evse_manager:Ev  :: EVSE IEC DC power supply OFF
2026-03-06 12:02:56.947952 [INFO] powersupply_dc:  :: Set mode: Off ChargingPhase: Charging
2026-03-06 12:02:56.989451 [INFO] imd:IMDSimulato  :: Stopped simulated isolation monitoring
2026-03-06 12:02:57.030379 [INFO] evse_manager:Ev  ::                                     CAR ISO V2G PowerDeliveryReq
2026-03-06 12:02:57.031230 [INFO] ovm:OVMSimulato  :: Over voltage monitoring: stopped.
2026-03-06 12:02:57.071961 [INFO] evse_manager:Ev  :: EVSE IEC Event PowerOff
2026-03-06 12:02:57.072104 [INFO] evse_manager:Ev  :: EVSE IEC Charger state: StoppingCharging->EVSE Paused
2026-03-06 12:02:57.115422 [INFO] evse_manager:Ev  :: EVSE ISO V2G PowerDeliveryRes
2026-03-06 12:02:57.378951 [INFO] evse_manager:Ev  :: EVSE ISO Change HLC Limits: 22080W/55.2A, target_voltage 400, actual_voltage 0, bpt_active false

2026-03-06 12:02:57.521421 [INFO] iso15118_charge  :: Welding-phase started
2026-03-06 12:02:57.522204 [INFO] evse_manager:Ev  ::                                     CAR ISO V2G WeldingDetectionReq
2026-03-06 12:02:57.649190 [INFO] evse_manager:Ev  :: EVSE ISO V2G WeldingDetectionRes
2026-03-06 12:02:58.219201 [INFO] evse_manager:Ev  ::                                     CAR ISO V2G WeldingDetectionReq
2026-03-06 12:02:58.263414 [INFO] evse_manager:Ev  :: EVSE ISO V2G WeldingDetectionRes
2026-03-06 12:02:58.809687 [INFO] evse_manager:Ev  ::                                     CAR ISO V2G WeldingDetectionReq
2026-03-06 12:02:58.949833 [INFO] evse_manager:Ev  :: EVSE ISO V2G WeldingDetectionRes
2026-03-06 12:02:59.446305 [INFO] evse_manager:Ev  ::                                     CAR ISO V2G WeldingDetectionReq
2026-03-06 12:02:59.583584 [INFO] evse_manager:Ev  :: EVSE ISO V2G WeldingDetectionRes
2026-03-06 12:03:00.089562 [INFO] evse_manager:Ev  ::                                     CAR ISO V2G SessionStopReq

2026-03-06 12:03:00.187670 [INFO] iso15118_charge  :: Closing TCP connection
2026-03-06 12:03:00.247408 [INFO] evse_manager:Ev  :: EVSE ISO V2G SessionStopRes

2026-03-06 12:03:05.190676 [INFO] iso15118_charge  :: TCP connection closed gracefully
2026-03-06 12:03:05.239345 [INFO] evse_manager:Ev  :: EVSE ISO D-LINK_TERMINATE.req
2026-03-06 12:03:05.239656 [INFO] evse_manager:Ev  :: EVSE IEC Set PWM Off
2026-03-06 12:03:05.326758 [INFO] evse_manager:Ev  :: EVSE ISO SLAC UNMATCHED
2026-03-06 12:03:05.327292 [INFO] evse_manager:Ev  :: EVSE ISO D-LINK_READY (false)

Closing the TCP Session and moving to EVSEPaused is the intended here. With the changes in this PR, a call of resume_charging would change from EVSEPaused->PrepareCharging, which would turn on the 5% PWM again, signaling to the EV that a new SLAC and TCP Session can start.

[barsnick]

Looks okay, One comment left @SebaLukas.

[Pietfried]

@djchhp @barsnick @hikinggrass @SebaLukas reviews were dismissed due to rebase and a test hash file update, so your approval is required once again