Split LibsqlUrlParser.parse into named steps #213

Goal

Split LibsqlUrlParser.parse into named steps. One 98-line method strips the prefix, builds the URI, resolves credentials, overrides TLS, validates the encoding, resolves timeouts, and rebuilds the endpoint. The precedence rules are invisible.

Depends on

#196. The bug fix lands first so this pass does not mix a behavior change into a move.

Pin

LibsqlUrlParserTest covers namespace paths, trailing slashes, ws and wss from both prefixes, TLS upgrade, encoding aliases and case, and protobuf rejection on HTTP. #195 adds the jdbc:sqlite:http:// and timeout cases.

Scope

• Extract normalizeUri, resolveAuthToken, resolveScheme, resolveEncoding, resolveDuration, and buildEndpoint.
• Leave parse as an orchestrator of at most 30 lines.
• Optionally move client construction out of LibsqlDriver.connect into a factory.

Preserve

• Query parameters beat Properties. jwt is an alias for authToken. password is the last resort.
• tls and ssl only upgrade. The upgrade happens before the encoding check, so ws with TLS and protobuf stays legal.
• Unknown encodings fail with SQLException, not IllegalArgumentException.
• A null URI path is empty, and the port is only kept when positive.

Acceptance

• parse is an orchestrator and each step is a named method with one concern.
• LibsqlUrlParserTest is green with no assertion edited.
• ./mvnw -pl libsql-jdbc -am test green.
• ./mvnw spotless:check green.