fix(oracle-l8-r4): scrub demo.flow-master.ai from Telemetry + Landing

Oracle round-9 watch-out: same liveMeta.fetchedFrom leak class
existed in two more user-visible surfaces:

- src/components/Telemetry.tsx: 'source' block rendered the host
  string. Now hard-coded 'EA2'.
- src/scenes/Landing.tsx: hero paragraph said 'runs end-to-end
  through EA2 on <host>'. Dropped the host suffix entirely.

liveMeta import removed from Telemetry (no other refs). Landing
still uses liveMeta for the workItems/distinctDefs stat counters.

src/scenes/Landing.tsx

@@ -51,8 +51,7 @@ export default function Landing() {
             FlowMaster turns the operational map of a company into living,
             typed processes — backed by humans, agents, and rules — and gives you
             one control surface to drive them. Every procurement, finance, people,
-            and service workflow runs end-to-end through EA2 on{" "}
-            <span className="mono">{liveMeta.fetchedFrom?.replace("https://", "") ?? "the FlowMaster backend"}</span>.
+            and service workflow runs end-to-end through EA2.
           </p>
           <div className="hero-actions">
             <button className="btn btn-primary btn-lg" onClick={() => setScene("mission")}>