fix: skip token-less webhooks in pick(); self-heal deletes the dead pick, not the managed webhook

dpywebhooks-1 (HIGH): pick()/send_any could select token-less channel-follower
(type 2) or application-owned (type 3) webhooks returned by channel.webhooks().
Webhook.send raises a raw ValueError on those before any HTTP call, and
send_any only caught discord.HTTPException, so the ValueError bypassed
fallback and self-heal entirely. strategy='first' picks the lowest id, so any
channel following an announcement channel could be permanently broken. Fix:
pick() now filters candidates to w.token is not None.

dpywebhooks-2 (HIGH): send_any's self-heal always called clear(), which
targets the managed webhook (cache/store), not the dead webhook that was
actually picked. When the dead pick and the managed webhook differed, this
deleted a healthy managed webhook and churned delete+create toward the
10-cap on every send. Fix: self-heal now deletes the dead picked webhook
directly (bot-auth webhook.delete() authorizes on it without its own token);
clear() is only used when the pick IS the managed webhook.

dpywebhooks-8 (nit): count() and _create() now read live webhooks through
list() instead of calling channel.webhooks() directly, so the token filter
and any future list() change reach all three call sites from one source.

Version 0.1.0 -> 0.1.1. README + module docstrings updated to document the
token filter and the corrected self-heal delete target.

Signed-off-by: disqualifier <dev@disqualifier.me>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "dpy_webhooks"
-version = "0.1.0"
+version = "0.1.1"
 description = "Per-channel Discord webhook management for discord.py — get-or-create, persist, enforce the cap, send. Config-free, injectable, installable."
 requires-python = ">=3.10"
 dependencies = [