chore(security): enhance environment configuration, CI workflows, and wallet daemon with security improvements

- Restructure .env.example with security-focused documentation, service-specific environment file references, and AWS Secrets Manager integration
- Update CLI tests workflow to single Python 3.13 version, add pytest-mock dependency, and consolidate test execution with coverage
- Add comprehensive security validation to package publishing workflow with manual approval gates, secret scanning, and release

contracts/test/fuzz/DynamicPricing.t.sol

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import "forge-std/Test.sol";
+import "../../contracts/DynamicPricing.sol";
+
+contract DynamicPricingFuzzTest is Test {
+    DynamicPricing public pricing;
+    address public owner;
+    address public provider;
+
+    function setUp() public {
+        owner = address(this);
+        provider = makeAddr("provider");
+        pricing = new DynamicPricing();
+        vm.prank(owner);
+        pricing.addProvider(provider);
+    }
+
+    function invariant_noNegativePrice() public {
+        uint256 price = pricing.getCurrentPrice(provider);
+        assertGe(price, 0, "Price should never be negative");
+    }
+
+    function testFuzz_PriceAdjustment(uint256 basePrice, uint256 utilization) public {
+        vm.assume(basePrice >= 0.001 ether && basePrice <= 10 ether);
+        vm.assume(utilization >= 0 && utilization <= 10000); // basis points
+
+        vm.prank(provider);
+        pricing.setBasePrice(basePrice);
+
+        vm.prank(owner);
+        pricing.updateUtilization(provider, utilization);
+
+        uint256 price = pricing.getCurrentPrice(provider);
+        assertGe(price, 0, "Adjusted price must be non-negative");
+    }
+}