fix: increase SEED_SWAP_ETH to overcome amplitude check in bootstrap

The 0.01 ETH seed swap only moved the tick 127 ticks from the start
and 37 ticks from the ANCHOR center — far below the 400-tick minimum
amplitude (2 × TICK_SPACING).  As a result, the second recenter()
always reverted with "amplitude not reached", preventing VWAP bootstrap.

Root cause: SEED_SWAP_ETH was 1 % of SEED_LM_ETH.  The ANCHOR
position holds ~25 % of SEED_LM_ETH as WETH across ~7 200 ticks, so
consuming half of that WETH (≈0.125 ETH) is already enough to move
the price 3 600 ticks past centre.

Fix: raise SEED_SWAP_ETH from 0.01 ether to 0.5 ether (50 % of
SEED_LM_ETH), giving a 4× margin over the minimum required.  Verified
against a Base-Sepolia fork at block 20 000 000 (same environment as
CI): VWAP is now bootstrapped and cumulativeVolume > 0 after deployment.

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

onchain/script/DeployLocal.sol

@@ -78,10 +78,14 @@ contract DeployLocal is Script {
 
     // Seed amounts for VWAP bootstrap.
     // seedLmEth: initial ETH sent to the LM to create thin bootstrap positions.
-    // seedSwapEth: ETH used for the seed buy; with thin positions this easily moves
-    //              the price >400 ticks (the minimum amplitude for a second recenter).
+    // seedSwapEth: ETH used for the seed buy.  Must be large enough to move the
+    //   Uniswap tick >400 ticks past the ANCHOR center (minAmplitude = 2*tickSpacing
+    //   = 400 for the 1%-fee pool).  The ANCHOR typically holds ~25% of seedLmEth as
+    //   WETH across a ~7200-tick range; consuming half of that WETH (≈0.125 ETH)
+    //   moves the price ~3600 ticks — well above the 400-tick threshold.
+    //   0.5 ether provides a 4× margin over the minimum needed.
     uint256 internal constant SEED_LM_ETH = 1 ether;
-    uint256 internal constant SEED_SWAP_ETH = 0.01 ether;
+    uint256 internal constant SEED_SWAP_ETH = 0.5 ether;
 
     // Deployed contracts
     Kraiken public kraiken;