Refactor code structure for improved readability and maintainability

docs/api/vex-consensus.md

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+# VEX Consensus Stream Contract (draft placeholder)
+
+**Status:** TODO · awaiting VEX Lens Guild
+
+## Scope
+- `/vex/consensus` streaming APIs via Web gateway with tenant RBAC/ABAC, caching, and telemetry.
+
+## Needed from owners
+- SSE/stream envelope (fields, heartbeats, retry/backoff headers), sample NDJSON stream.
+- RBAC/ABAC requirements and caching rules; idempotency/correlation headers.
+- Error codes and rate limits.
+
+## TODO
+- Insert finalized contract + samples; note schema hash/date; reference in Web V sprint log.