[magnusp]

Fixes #202

Moves the AUTOINCREMENT grammar out of LibsqlResultSetMetaData into package-private SqlAutoIncrement (same package), and points both call sites at it. The package-private seam no longer lives on the metadata class.

What moved

• New SqlAutoIncrement.java: isAutoIncrementColumn, tableDefinitions, columnDefinitionIsAutoIncrement, tableConstraintIsAutoIncrement, indexedColumnIsAutoIncrement, skipConstraintName, isConstraintKeyword, containsKeyword.
• LibsqlResultSetMetaData.isAutoIncrement now calls SqlAutoIncrement.isAutoIncrementColumn(...) and keeps the info.primaryKey() requirement.
• LibsqlDatabaseMetaData.getColumns now calls SqlAutoIncrement.isAutoIncrementColumn(...) and keeps the primaryKey && guard.
• No parse rule, message, test, dependency, pom.xml, type-mapping, declared-type, or table-resolver code changed.

Verbatim proof

Old method blocks (origin/main lines 73–88 and 529–648) vs new SqlAutoIncrement lines 11–147, whitespace-normalized (trailing whitespace trimmed, blank lines dropped):

$ git show origin/main:.../LibsqlResultSetMetaData.java | sed -n '73,88p;529,648p' > /tmp/old-grammar.txt
$ sed -n '11,147p' .../SqlAutoIncrement.java > /tmp/new-grammar.txt
$ sed 's/[[:space:]]*$//' /tmp/old-grammar.txt | grep -v '^$' > /tmp/old-n.txt
$ sed 's/[[:space:]]*$//' /tmp/new-grammar.txt | grep -v '^$' > /tmp/new-n.txt
$ diff -u /tmp/old-n.txt /tmp/new-n.txt
NORMALIZED-DIFF: empty; 128 code lines identical

The only non-code delta is the single blank separator line between the two extracted method groups; the original separator was blank line 89.

Probe

Perturbed comment skipping in SqlTokenizer so a block comment emitted its body as a WORD token, making the keyword inside /* AUTOINCREMENT */ visible to containsKeyword:

$ ./mvnw -pl libsql-jdbc -am -Dtest='LibsqlResultSetMetaDataTest#ignoresAutoIncrementInsideSqlComments' \
    -Dsurefire.failIfNoSpecifiedTests=false test
[ERROR] LibsqlResultSetMetaDataTest.ignoresAutoIncrementInsideSqlComments -- Time elapsed: 0.045 s <<< FAILURE!
Expecting value to be false but was true
	at ...LibsqlResultSetMetaDataTest.ignoresAutoIncrementInsideSqlComments(LibsqlResultSetMetaDataTest.java:128)
[ERROR] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0

Reverted with git checkout -- .../SqlTokenizer.java; git status --porcelain then listed only the three intended files.

Line counts

• LibsqlResultSetMetaData.java: 680 → 544 lines (limit < 580).
• SqlAutoIncrement.java: 148 lines (new).
• git diff --stat: 3 files changed, 152 insertions(+), 140 deletions(-).

Lanes

• ./mvnw -pl libsql-jdbc -am test → 392 tests, 0 failures, 0 errors, 0 skipped.
• ./mvnw spotless:apply → BUILD SUCCESS; ./mvnw spotless:check → BUILD SUCCESS (no reformat needed).
• ./mvnw -pl libsql-conformance -am verify → 272 tests, 0 failures, 0 errors, 7 skipped (matches baseline).