Release v0.3.0: 25 languages, install/update CLI, skills, benchmark

Language expansion (13 → 25):
  Add Ruby, C, Bash, Zig, Elixir, Haskell, OCaml, HTML, CSS, YAML,
  TOML, HCL with tree-sitter grammars and language specs.
  Restore Erlang and SQL with extraction fixes.

CLI install/update/uninstall commands:
  Auto-detect Claude Code and Codex CLI, register MCP server,
  install task-specific skills, self-update with SHA-256 verification.

Embedded skills (4):
  exploring, tracing, quality, reference — auto-trigger in Claude Code
  for graph-first code discovery.

Pipeline improvements:
  Docstring extraction, enrichment pass for params/returns/complexity,
  graceful context cancellation, improved test detection.

35-language benchmark (BENCHMARK.md):
  12 questions × 35 repos, 91.8% overall score, Linux kernel stress
  test (20K nodes, zero timeouts). Replaces old benchmark artifacts.

.github/workflows/release.yml

@@ -25,10 +25,9 @@ jobs:
         with:
           go-version: "1.26"
 
-      - uses: golangci/golangci-lint-action@v6
+      - uses: golangci/golangci-lint-action@v7
         with:
-          version: latest
-          install-mode: goinstall
+          version: v2.10
           args: --timeout=5m
 
   build-unix: