build: fix dependency security alerts

[starius]

Postgres client was bumped to pgx v5 to go away from archived versions.

Tested this manually in regtest on all swap types - everything is green.

Pull Request Checklist

• Update release_notes.md if your PR contains major features, breaking changes or bugfixes

[gemini-code-assist]

Summary of Changes

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This pull request addresses security vulnerabilities by upgrading the Postgres client to pgx v5. It includes comprehensive updates to the project's dependency tree, including minor version bumps and removals of deprecated packages. Additionally, it refines the default configuration for connecting to the daemon and introduces a temporary go.mod replacement to bridge the gap until the required lnd version is released.

Highlights

• Dependency Security: Upgraded the Postgres client to pgx v5 to move away from archived versions and mitigate security alerts.
• Configuration Updates: Updated default configuration logic to correctly resolve the TLS path using the application data directory.
• Dependency Management: Performed a broad update of project dependencies and added a temporary replacement for sqldb to ensure the pgx v5 migration is properly handled.

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[gemini-code-assist]

Code Review

This pull request removes the legacy pgx v4 and pgproto3 dependency chain by migrating to pgx v5 and replacing the lnd/sqldb dependency with a newer revision. It also updates several other Go dependencies and refactors assets/client.go to avoid importing tapcfg by constructing default paths manually. However, setting MacaroonPath to an empty string in DefaultTapdConfig will cause client initialization to fail immediately when it attempts to read the macaroon file. It is recommended to default to the mainnet admin macaroon path instead.

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[gemini-code-assist]

Setting MacaroonPath to "" by default will cause NewTapdClient(DefaultTapdConfig()) to fail immediately because getClientConn unconditionally attempts to read the macaroon file using os.ReadFile(config.MacaroonPath). Since mainnet is the default network for tapd, we should default to the mainnet admin macaroon path.

Suggested change

	MacaroonPath: "",
	MacaroonPath: filepath.Join(defaultTapdDir, "mainnet", "admin.macaroon"),