conformance: flux conformance spec fails (shared spec bug)

[lukeocodes]

Problem

The flux conformance spec (interfaces/flux/conformance/stream.spec.js) fails with 8/8 tests failing. The API tests and UI tests all pass.

This is the same issue as node-flux (deepgram-starters/node-flux#1) — the conformance spec has two bugs:

1. Endpoint path bug: Spec connects to /flux/stream but starters serve on /api/flux
2. Architecture mismatch: Spec expects stream_url ingestion architecture but starters use WebSocket proxy architecture

Results

• API tests (tests/flux/api/): 5 passed, 1 skipped
• UI tests (tests/flux/ui/): 2 passed
• Conformance spec (interfaces/flux/conformance/): 0 passed, 8 failed

Root Cause

The conformance spec needs to be updated to match the actual WebSocket proxy architecture used by all flux starters.