feat: add LSP server, VSCode + DataGrip extensions, release infra, autofix

- pkg/lsp: JSON-RPC 2.0 LSP server (formatting, diagnostics, codeAction quick-fixes)
- cmd/pgtidy: lsp and config subcommands
- pkg/diagnostics: TextFix struct for byte-range autofixes
- pkg/lint: MIG001/MIG003 autofixes, ApplyFixes helper, --fix flag on lint command
- editors/vscode: TypeScript extension with LanguageClient, showVersion/showConfig/formatDocument commands, logo
- editors/datagrip: Gradle JetBrains plugin via LSP4IJ, pluginIcon
- .goreleaser.yaml, .github/workflows: CI + release pipeline
- Makefile: snapshot, release, vscode-compile, vscode-package targets
- go.mod + all imports: module path updated to git.warky.dev/wdevs/pgtidy
- assets: logo files (256px, 128px, 1024px, ico)

docs/todo.md

@@ -9,7 +9,7 @@ Legend: ✅ done · 🚧 in progress · ⬜ not started
 ## V1 — Formatter + CLI (current milestone)
 
 ### ✅ Scaffold module + repo hygiene
-- `go.mod` (`module github.com/hein/pgtidy`, go 1.26).
+- `go.mod` (`module git.warky.dev/wdevs/pgtidy`, go 1.26).
 - Replaced WkMailSync boilerplate: `AGENTS.md` (PgTidy architecture + invariants),
   `CLAUDE.md`, `Makefile` (`build`/`test`/`vet`/`fmt`/`lint`/`clean`).
 - Directory layout created (`cmd/`, `pkg/...`, `testdata/`).
@@ -108,21 +108,33 @@ Legend: ✅ done · 🚧 in progress · ⬜ not started
   - NAM001/2/3 table/column/function names not snake_case (quoted identifiers only)
 - `pgtidy lint [--only=ID,...] [files...]`; exits 1 on findings, 2 on error.
 - Fixture SQL in `testdata/lint/`; 6 tests covering violations + clean fixtures.
-- _`--fix` for autofixable rules: future._
+- `--fix` rewrites files in place applying autofixes; for stdin, prints fixed SQL to stdout.
+- Autofixable: **MIG001** (insert `CONCURRENTLY` after `INDEX`) and **MIG003** (insert `NOT VALID` before `;`). MIG002, COR*, NAM* are intentionally not autofixable.
+- `pkg/diagnostics.TextFix{Offset, End, New, Title}` — byte-range replacement attached to `Diagnostic.Fix`.
+- `pkg/lint.ApplyFixes` — applies all fixes in reverse-offset order; overlapping fixes skipped.
+- Fix helpers (`mig001Fix`, `mig003Fix`) handle pg_query's convention of `StmtLen` excluding the trailing `;`.
 
-## V3 — LSP + VSCode (later)
-- `pkg/lsp`: formatting + range formatting, publishDiagnostics, codeAction quick-fixes.
-- `editors/vscode`: TS extension (`vscode-languageclient`) launching bundled `pgtidy lsp`;
-  per-platform VSIX matrix in CI (rust-analyzer model) + target-less fallback.
+## ✅ V3 — LSP + VSCode
+- `pkg/lsp`: JSON-RPC 2.0 over stdio; `textDocument/formatting` (full document), `publishDiagnostics` on every open/change, `textDocument/codeAction` quick-fixes, lifecycle (initialize/shutdown/exit). No external deps.
+- `cmd/pgtidy/lsp.go`: `pgtidy lsp` subcommand; config discovered from cwd.
+- `editors/vscode/`: TS extension using `vscode-languageclient`; launches `pgtidy lsp` via stdio; `.pgsql` mapped to `sql` language; `pgtidy.path` / `pgtidy.enable` settings.
+- _Range formatting: future._
 
-## V4 — DataGrip (later)
-- `editors/datagrip`: integrate via free **LSP4IJ** plugin.
+## ✅ V4 — DataGrip
+- `editors/datagrip/`: Gradle-based JetBrains plugin targeting DataGrip 2024.3+ via LSP4IJ.
+  - `build.gradle.kts` / `settings.gradle.kts` / `gradle.properties` — IntelliJ Platform Gradle Plugin v2.
+  - `plugin.xml` — registers `PgTidyServerFactory` as an LSP4IJ `<server>` extension and maps `*.sql`/`*.pgsql` to it.
+  - `PgTidyServerFactory.kt` + `PgTidyServerConnection.kt` — launches `pgtidy lsp` via `ProcessStreamConnectionProvider`.
+  - Requires LSP4IJ plugin installed in the IDE; `pgtidy` binary on PATH.
 
 ---
 
-## Build / release (cross-cutting)
-- ⬜ Add goreleaser for the multi-platform binary matrix (clean: no cgo).
-- `make_release.sh` retained from boilerplate (generic version tagging).
+## ✅ Build / release (cross-cutting)
+- `.goreleaser.yaml`: multi-platform matrix — linux/darwin × amd64/arm64 + windows/amd64; no CGO; ldflags version injection; draft GitHub release.
+- `Makefile` extended: `snapshot` (local multi-platform build), `release` (publish), `vscode-compile`, `vscode-package`.
+- `.github/workflows/ci.yml`: test + vet + gofmt check + goreleaser snapshot on every push/PR.
+- `.github/workflows/release.yml`: goreleaser publish + VSCode `.vsix` artifact on `v*` tag.
+- `make_release.sh` retained from boilerplate.
 
 ## Core invariants (must always hold — tested)
 1. ✅ Lossless lex: `emit(Lex(src)) == src` (corpus round-trip).