feat: tag outgoing data-fair API calls with a /mcp referer#2
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Tag outgoing calls to the data-fair API with a
Referer: <baseUrl>/mcpheader — but only when the MCP is self-hosted as part of the data-fair stack (noportalUrlconfigured, origin resolved fromX-Forwarded-*headers). In standalone mode (PORTAL_URLset, connecting to a remote data-fair) noRefereris sent.Why: a companion metrics-classification feature (data-fair/metrics) buckets API traffic by referer; this lets our own hosted MCP server's traffic land in the "mcp" bucket instead of a generic "other" one. We only want to tag traffic to our own instances, not inject a referer into third-party data-fair instances reached in standalone mode.
Heads-up:
buildAxiosOptionsnow takesbaseUrl: stringinstead of raw headers — all 7 call sites across 6 tool files were updated accordingly.