Retry handshake collisions, start specless ovens, and fix microwave progress

[mbillow]

Three fixes from a pass over the open issues.

Handshake collisions (#567)

• PeerInitiatedHandshakeError means the appliance was opening its own session toward us. The library says an immediate retry normally clears it, but the coordinator treated it as any other failure, so it cost a poll cycle or a failed command.
• _connect_session now retries it once on the same port, which is what config_flow._worth_retrying already does. This covers the poll path and the command path.
• Port rediscovery now runs only after a timeout or an EndpointError. An appliance that answered with an alert is still on the stored port. The exception that triggered a lookup is now logged, where it used to be dropped.
• Both behaviours have new tests in test_port_rediscovery.py, and both tests fail without the change.

Start a cook on boards with no modeSpec (#300)

• The NW9000KD wall oven publishes no modeSpec, so it got no start. The reporter started Bake from Ready with the same Collection write every other board takes.
• A board without a modeSpec now offers its own live modes, minus:
  • maintenance programs: Descale, Drain, PyroFree, SelfClean, SteamClean, and HomeCare;
  • modes that no board with a modeSpec declares Start&Setting: Broil*, Autocook/Easycook*, Defrost, BreadProof, Toast*, MicroWave*, and Speed*.
• The setpoint uses the family's existing fixed range, and only on boards that report a temperature. Cook time is optional.
  • Ovens: 30–270 °C or 175–550 °F.
  • Microwaves: 40–200 °C. That range is Celsius only, so a Fahrenheit microwave offers no temperature, matching its setpoint control.

Board in the fixtures	Start cooking now offers
NW9000KD wall oven	Bake, ConvectionBake, ConvectionRoast, SteamBake, SteamRoast
EU oven (oven)	Its 11 cooking modes
ME7500D microwave	KeepWarm
NW9300MD combo	Convection, with no temperature (Fahrenheit)
NV75N dual cook	Nothing (HomeCare only)

Only Bake on the NW9000KD is confirmed on hardware, and that start included a cook time. Three tests that pinned the old "no modeSpec, no start" rule are updated. New tests cover:

• the reporter's exact payload;
• the optional cook time;
• the oven and microwave temperature bounds;
• the maintenance exclusion.

Microwave progress (#181)

• TP1X microwaves report progressPercentage 201 for the whole of a cook, so the sensor showed 201 %.
• The oven-family progress sensor, which microwaves share, now reports anything outside 0–100 as unknown.

Checks

ruff format --check, ruff check, ty check and pytest tests/ all pass locally on Python 3.13, with 2,691 tests.

Refs #567, #300, #181

🤖 Generated with Claude Code

https://claude.ai/code/session_01LvafUqpe5oSKcVcp5Z8c1N