Fix game title update logic for non-ASCII titles on new subscription

[BlasterAlex]

• Title with trademark symbols (™, ®, ©) was incorrectly treated as
  non-ASCII by str.isascii(), blocking updates like "Spider-Man™"
  replacing a stored non-ASCII title. Fix by stripping marks before check.
• Add condition: if en-us is among the subscription's regions, its
  canonical title replaces a stored non-ASCII title even when the
  canonical title is also non-ASCII.
• Add four integration tests covering the new cases.

https://claude.ai/code/session_011PnVRsKnQzEYLDAgC7N93n

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
config.py	19	3	84%	27–29
bot
__init__.py	0	0	100%
formatters.py	104	0	100%
main.py	17	17	0%	1, 3–6, 8–11, 13, 16–18, 22–25
metrics.py	9	0	100%
bot/handlers
__init__.py	7	0	100%
regions.py	84	56	33%	29, 32, 34–35, 37–38, 40–41, 45, 47–48, 56–58, 60–61, 69, 72, 74–76, 80, 82, 93–97, 102, 107–108, 115, 117–121, 123, 126, 128–129, 131, 133–134, 138, 140, 147, 149, 152, 154, 156–158, 162, 164, 167
search.py	140	3	97%	155, 190–191
start.py	11	3	72%	13–15
subscriptions.py	83	57	31%	23, 25–26, 28–32, 34–36, 38–39, 41–44, 46–47, 53, 61–63, 65–68, 70–71, 73, 78, 89, 91, 94–95, 97–99, 101, 108–109, 111, 118, 125, 128–132, 139–141, 144–148
bot/keyboards
__init__.py	0	0	100%
inline.py	54	21	61%	11–15, 17, 21–22, 26–29, 33–34, 44–47, 80–82
bot/middlewares
__init__.py	0	0	100%
db.py	11	11	0%	1, 3–5, 8–10, 12, 18–20
bot/states
__init__.py	0	0	100%
subscription.py	10	0	100%
db
__init__.py	0	0	100%
base.py	3	0	100%
session.py	7	2	71%	10–11
db/models
__init__.py	8	0	100%
game.py	19	0	100%
game_region.py	20	0	100%
price_drop.py	12	0	100%
region.py	13	0	100%
subscription.py	13	0	100%
user.py	12	0	100%
user_region.py	9	0	100%
services
__init__.py	0	0	100%
currency.py	40	0	100%
notifier.py	11	0	100%
price.py	17	0	100%
ps_api.py	20	13	35%	21–22, 24–27, 29–32, 39–41
ps_store.py	236	3	98%	233–234, 365
region.py	32	0	100%
subscription.py	165	0	100%
user.py	14	0	100%
worker
__init__.py	0	0	100%
main.py	21	21	0%	1, 3–8, 10–12, 14, 17–19, 24–29, 31
metrics.py	8	0	100%
worker/tasks
__init__.py	0	0	100%
notify.py	54	0	100%
price_check.py	59	0	100%
TOTAL	1342	210	84%