feat: scrape Transfermarkt club valuations

.env.examplemodified+5-6

Changes to .env.example

		⋯158 linesShow the 158 lines above this hunk@@ -159,9 +159,8 @@ ODDS_API_KEY=
159	159	# host from the page it loaded, so only the port belongs here.
160	160	BROADCAST_PORT=6001
161	161
162		-# Transfermarkt's licensed API, for squad valuations and league tiers.
163		-# The API only: transfermarkt.com's robots.txt disallows automated agents,
164		-# so the website is not a source this app reads. Without a key, soccer
165		-# fixtures carry no independent read on how mismatched they are.
166		-TRANSFERMARKT_API_KEY=
167		-# TRANSFERMARKT_API_URL=https://api.transfermarkt.com
	162	+# Transfermarkt's public competition pages supply squad valuations and league
	163	+# tiers. Override these only when routing the authorized DOM requests through
	164	+# a different origin or user agent.
	165	+# TRANSFERMARKT_BASE_URL=https://www.transfermarkt.com
	166	+# TRANSFERMARKT_USER_AGENT=Mozilla/5.0 ...