chore: scrub remaining Teller / financial / DuckDB references (#27) (… #49

Job	Run time
Coverage	24s
Lint & Format	9s
Frontend Build	16s
Architecture (import-linter)	10s
Commit-type sync	8s
Pre-commit	1m 9s
Unit tests	20s
Type Check	19s
Branch-protection contexts sync	12s
Frontend Quality	18s
	3m 25s

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