fix: change storage to memory in Drippie.executable() view functiont.

[zunixport]

Problem

The executable() function in Drippie.sol was incorrectly using storage instead of memory for a local state variable, despite being marked as a view function.

Impact

• Violated the view function contract by implying storage modification
• Could cause compilation issues
• Inefficient gas usage due to incorrect memory handling

Solution

Changed DripState storage state to DripState memory state on line 174 in the executable() function.

[cb-heimdall]

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