Support Oracle-style SQL block splitting

[haos666]

Summary

Follow-up to #316 for the Oracle/DM splitter work discussed with @ymadd.

This keeps the behavior additive and dialect-gated behind the existing oracle SQL dialect:

• enable line-leading / as an Oracle-style statement terminator
• fold PL/SQL-style source units until the next slash-terminated segment instead of splitting on internal semicolons
• support Oracle q-quoting / nq-quoting so ; and / inside quoted literals do not split statements
• include DM-specific block openers: CREATE CLASS, CREATE CLASS BODY, and CREATE JAVA CLASS
• keep other dialect presets structurally unchanged by leaving the new flags disabled outside oracle

This PR does not include trigger RPC forwarding (#321), batch forwarding, SQL import/export, or BLOB hooks.

Validation

Automated checks:

• pnpm exec vitest run tests/utils/sqlSplitter
• pnpm exec vitest run tests/utils/sqlSplitter/dialects.test.ts tests/utils/sqlSplitter/splitter.test.ts tests/utils/sqlSplitter/tokenizer.test.ts
• pnpm exec vitest run (130 files / 2588 tests)
• pnpm run typecheck
• pnpm run lint
• pnpm run build
• pnpm run test:rust (671 Rust tests)
• git diff --check

Local DM/UI smoke on the DM external plugin:

• CREATE OR REPLACE TRIGGER ... BEGIN ... END; / plus a following SELECT is detected as 2 statements, not split at internal semicolons.
• q-quoted text containing both ; and a line-leading / stays inside one statement.
• simple slash-separated SQL statements split as expected under the oracle dialect.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (5 files)

• src/utils/sqlSplitter/index.ts — Adds Oracle dialect flags (slashTerminator, plsqlBlocks, qQuoting) to DialectOptions
• src/utils/sqlSplitter/splitter.ts — Implements PL/SQL block folding until slash terminators; robust opener detection for CREATE, BEGIN, DECLARE, WITH FUNCTION/PROCEDURE
• src/utils/sqlSplitter/tokenizer.ts — Adds slashDelimiter and Q-quoted string scanning (q'…', nq'…')
• tests/utils/sqlSplitter/splitter.test.ts — Comprehensive tests covering block folding, q-quoting, labeled blocks, inline functions, EOF handling, and SQL*Plus tradeoffs
• tests/utils/sqlSplitter/tokenizer.test.ts — Tokenizer tests for slash delimiter line-leading logic and q-quoting boundaries

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_{Reviewed by kimi-k2.6-20260420 · 259,687 tokens}