Fix CLI bugs: DML classification, trace timeout, partition timestamp

[apstndb]

Summary

• Make SQL/DML classification robust to comments and statement prefixes #58: Route DML via gsqlutils/stmtkind.IsDMLLexical (memefish lexer + hint-aware first token) instead of regex/hand-rolled comment stripping.
• Respect --timeout when Cloud Trace export is enabled #57: Keep --timeout when --experimental-trace-project is set; log trace shutdown errors instead of log.Fatal.
• Honor timestamp bound in --try-partition-query for historical schema checks #60: Use the computed timestamp bound for --try-partition-query.
• Fix Go 1.25 drift in README and container publish workflow #61: Update README Go version and pin ko.yml to go-version-file: go.mod.
• Drop gsqlsep; integration tests split DDL/DML with memefish.SplitRawStatements.

Rationale

Consolidate on memefish lexer-based utilities for statement classification and splitting rather than maintaining parallel ad-hoc parsers.

Test plan

• go test ./...
• TestWithCancelPreservesParentDeadline documents trace context wiring
• Emulator integration still passes with memefish-split fixtures

Fixes #57, #58, #60, #61

[gemini-code-assist]

Code Review

This pull request replaces regex-based DML detection with a custom SQL classifier (isDML) that strips leading comments and whitespace, updates Go version requirements to 1.25, refactors telemetry shutdown logic to prevent fatal crashes, and updates batch transaction options. Feedback points out that strings.Cut(rest, " ") fails to isolate the keyword if it is followed by other whitespace characters like newlines or tabs, and suggests using strings.IndexAny along with adding corresponding test cases.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.

[apstndb]

/gemini review

[gemini-code-assist]

Code Review

This pull request updates the project to Go 1.25, replaces regex-based DML detection with stmtkind.IsDMLLexical from gsqlutils, refactors telemetry shutdown handling, and updates the batch transaction initialization. It also adds a new context deadline test and migrates integration tests to use memefish for statement splitting. Feedback on the changes suggests removing the unused sqlclassify.go and sqlclassify_test.go files, and deferring bt.Cleanup(ctx) to prevent potential resource leaks during batch read-only transactions.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.