[WIP] Update to address feedback from PR #57

[Copilot]

• Extract duplicated Bech32 charset string to a class-level constant in MockLnServer.java
• Update generateValidBolt11Invoice() to use the constant
• Update calculateBech32Checksum() to use the constant
• Build and test the changes to ensure no regressions
• Clean up accidentally committed build artifacts

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[chatgpt-codex-connector]

💡 Codex Review

phoenixd-java/phoenixd-mock/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst

Lines 1 to 2 in 316c3f2

	xyz/tcheeric/phoenixd/mock/MockLnServer.class
	xyz/tcheeric/phoenixd/mock/Main.class

Remove build output from version control

The change introduces several files under phoenixd-* /target (e.g. compiled .class files and Maven status lists). These are generated by the build and will be rewritten every time mvn runs, causing noisy diffs and repository bloat. They should be deleted and ignored rather than committed so that future builds do not constantly modify tracked files.

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