[Eljees]

Follow-up to #7279 and the request to include it in #7276. #7276 has since merged with the adrules fix; this is the remaining BI change on current main.

The help documents xray api bi balancer1 balancer2, but only the first tag is queried, including with --json. Query every supplied tag in order through the existing GetBalancerInfo RPC and output formatters. A failed later tag now reports an error instead of silently succeeding after querying only the first tag. JSON output is a sequence of complete response objects.

The final merged diff contains the production fix. Two local regression cases called the actual command against a loopback gRPC recorder in text and JSON modes and verified both requested tags in order; both failed with the original source and passed with the fix. The fixture was removed during maintainer review. The merged production file is byte-identical to #7279.

Local validation against main 0afec660 included the regression fixture:

• Windows Go 1.27.3 and Linux Go 1.27.1 (-race): all tests in ./main/commands/... ./app/router/... pass (59 leaf tests on each platform; no test failures or skips).
• Five actual CLI cases against a synthetic loopback RoutingService pass: each single tag, multiple tags in text/JSON, and an invalid later tag. On the baseline, the last three cases fail their assertions.
• Main build, repository format check and git diff --check pass.
• go vet ./main/commands/... ./app/router/... reports the existing lost-cancel diagnostic at app/router/command/command.go:101. It is identical with the original BI source and with the fix on Windows; Linux reports the same diagnostic. No analyzers were disabled.

AI-assisted implementation and tests; separately reviewed and checked against the reproduced command behavior.