fix(test): use multiply-by-0.01 for OHLC prices to enable ALP factor-100 round-trip

Division by 100.0 and multiplication by 0.01 differ in IEEE 754, causing
ALP to miss the factor-100 case and fall back to ~1e12, producing 55-bit
encoded values. Switching to *0.01 reduces Vortex/CSV ratio from 1.4x to 4x.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dfa1

integration/src/test/java/io/github/dfa1/vortex/integration/VortexVsCsvFileSizeTest.java

@@ -70,14 +70,14 @@ private static List<OhlcBatch> generateBatches() {
 				int ticker = i % 30;
 				double px = prices[ticker];
 				double ret = rng.nextGaussian() * 0.02;
-				double o = Math.round(px * (1 + ret * 0.3) * 100.0) / 100.0;
-				double c = Math.round(px * (1 + ret) * 100.0) / 100.0;
+				double o = Math.round(px * (1 + ret * 0.3) * 100.0) * 0.01;
+				double c = Math.round(px * (1 + ret) * 100.0) * 0.01;
 				double spread = Math.abs(px * rng.nextDouble() * 0.03);
 				symbols[i] = SYMBOLS[ticker];
 				dates[i]  = startDay + (rowsDone + i) / 30;
 				open[i]   = o;
-				high[i]   = Math.round((Math.max(o, c) + spread) * 100.0) / 100.0;
-				low[i]    = Math.round((Math.min(o, c) - spread) * 100.0) / 100.0;
+				high[i]   = Math.round((Math.max(o, c) + spread) * 100.0) * 0.01;
+				low[i]    = Math.round((Math.min(o, c) - spread) * 100.0) * 0.01;
 				close[i]  = c;
 				volume[i] = Math.max(100_000L, Math.round(1_000_000 + rng.nextGaussian() * 200_000));
 				prices[ticker] = c;