Support extra_data on dynamically-added plugins

[sastraxi]

Problem

A plugin added from the mod-ui web UI mid-session was missing extra_data, so NAM tiles show a generic name instead of the model, and the Notes panel opens blank. Boards loaded from disk are unaffected — hydrate has the instance number and reads the TTL.

Mechanism

plugins.customization.lookup populates extra_data by reading {bundlepath}/effect-{instance_number}/effect.ttl. Pedalboard._build_plugin (the add WS path) has neither the bundle nor the number, so it calls the customizer with defaults and the parser never runs.

Fix: consume patch_set

mod-ui already broadcasts what the TTL parsers are digging for:

patch_set {instance} {writable} {paramuri} {valuetype} {valuedata}

... whenever a writable property changes, and it also replays every stored property on the connect dump. The paramuris are the same ones _MODEL_RE and _NOTES_RE match in the TTL — …neural-amp-modeler-lv2#model, …notes#text — because that is how patch properties serialize into effect-N/effect.ttl in the first place.

The fix is to respond to these extra fields:

• ws_protocol.py — add a PatchSetMessage(instance, param_uri, value_type, value) case
• plugins/customization.py — add a second registration hook alongside extra_data_fn, keyed by property URI, that builds PluginExtraData from a live value rather than TTL text.
• modhandler.py — on PatchSetMessage, resolve the plugin, rebuild its customization.extra_data, then repaint.

This covers the case the TTL never can: a freshly added plugin has no effect-N directory at all until the board is saved. It also makes extra_data track mid-session changes — swap the NAM model in the browser and the tile follows.

Bonus: the Notes TTL regex

_NOTES_RE required """triple quotes""". Turtle only long-quotes when the text needs it, so any single-line note serialized as "Abc123" and silently failed to parse — blank panel, no pencil, on the loaded-board path where extra_data was supposed to work. Fixed alongside; unrelated to the dynamic-add gap above.