Keep parentheses and plus sign in modelIcon URLs

[krobipd]

The problem

Devices whose model name contains parentheses or a plus sign show the default "unavailable" icon, and the icon download fails with HTTP 404. The reported case is CK-TLSR8656-SS5-01(7014); the same class also hits e.g. Yale locks like YMF40/YDM4109+/YDF40.

sanitizeImageParameter replaced every character outside [a-z\d\-_./:] with a dash, so CK-TLSR8656-SS5-01(7014) became CK-TLSR8656-SS5-01-7014- and the generated URL 404'd:

generated: https://www.zigbee2mqtt.io/images/devices/CK-TLSR8656-SS5-01-7014-.png   -> 404
actual:    https://www.zigbee2mqtt.io/images/devices/CK-TLSR8656-SS5-01(7014).png    -> 200

The fix

The z2m image filename is an exact match of the device model — herdsman-converters keeps (, ) and + verbatim; only / and spaces are turned into -. Adding () and + to the allowed character class is the whole change:

- const replaceByDash = [/\?/g, /&/g, /[^a-z\d\-_./:]/gi, /[/]/gi];
+ const replaceByDash = [/\?/g, /&/g, /[^a-z\d\-_./:()+]/gi, /[/]/gi];

Verified against the live image server (herdsman-converters 26.73.0):

model	resulting filename	HTTP
CK-TLSR8656-SS5-01(7014)	…SS5-01(7014).png	200
CK-BL702-ROUTER-01(7018)	…ROUTER-01(7018).png	200
YMF40/YDM4109+/YDF40	YMF40-YDM4109+-YDF40.png	200
AV2010/14	AV2010-14.png	200
AE 260	AE-260.png	200

This fixes every parens (31) and plus (39) model without changing the slash (117) or space (738) models, whose dash replacement stays correct. ? and & are still replaced.

Existing devices

modelIcon is rebuilt on every coordinator connect (doConnect → syncAllDeviceStates → updateDev writes native.modelIcon for every known device), so devices that already stored the bad URL are corrected on the next adapter restart — no re-pairing needed.

Test plan

• Functional test over the public getDeviceIcon for the five models above plus a ?/& case (unchanged → dash) — red before the change, green after
• npm run test:package (56 passing) and npm run test:unit pass
• npm run lint clean, node --check lib/utils.js ok

Addresses #2896

🤖 Generated with Claude Code

[asgothian]

This PR falls short of the requirements. An alternative fix is already in place for the (), the + will be added in the near future.