fix: decrypt against current Bitwarden cloud (headers, 2FA, camelCase… #106

Job	Run time
clippy	24s
vault --version emits §13.2 attribution	39s
cargo-audit	3m 10s
headless build (no TUI / clipboard deps)	27s
test (macos-latest)	43s
rustfmt	12s
test (ubuntu-latest)	33s
REUSE lint	14s
cargo-deny	40s
	7m 2s

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