fix(codemods): SIGSEV segfault problem. reduce amount of parse() calls. Preserve ast root refe…

[BobrImperator]

• Refactors import processing to preserve root AST for longer.
• Reduce the amount of source -> AST processing. Re-use already existing AST instead.
  [bug] SIGSEGV when GC collects native AST objects during concurrent async operations (napi, macOS ARM64) ast-grep/ast-grep#2553

The problem doesn't seem to happen on small projects or when the warp-drive codemods are built directly and ran with node ~/Projects/warp-drive/packages/codemods/dist/index.js apply migrate-to-schema --config=./example-codemod.config.json

⚠️ Temporary solution:
Setting ulimit -s unlimited (Unlimited stack-size) points towards a stack overflow issue while running the codemod against large projects. The problem appears to be happening in @ast-grep/napi / treesitter
ulimit -s unlimited && pnpx @ember-data/codemods@canary apply migrate-to-schema --config=./example-codemod.config.json
ulimit -s unlimited && node~/Projects/warp-drive/packages/codemods/dist/index.js apply migrate-to-schema --config=./example-codemod.config.json

Reproductions:

• bun
  bun ~/Projects/warp-drive/packages/codemods/dist/index.js apply migrate-to-schema --config=./example-codemod.config.json

Bun v1.3.6 (d530ed99) macOS Silicon
macOS v15.7.1
CPU: fp aes crc32 atomics
Args: "bun" "~/Projects/warp-drive/packages/codemods/dist/index.js" "apply" "migrate-to-schema" "--config=./example-codemod.config.json"
Features: Bun.stderr(2) Bun.stdin(2) Bun.stdout(2) dotenv jsc transpiler_cache tsconfig(3) tsconfig_paths(2) process_dlopen
Builtins: "bun:main" "node:assert" "node:buffer" "node:child_process" "node:events" "node:fs" "node:fs/promises" "node:module" "node:os" "node:path" "node:process" "node:stream" "node:string_decoder" "node:tty" "node:url" "node:util"
Elapsed: 10198ms | User: 9570ms | Sys: 916ms
RSS: 2.00GB | Peak: 2.00GB | Commit: 0.26GB | Faults: 62 | Machine: 51.54GB

panic(main thread): Segmentation fault at address 0x16C3E3FD0
oh no: Bun has crashed. This indicates a bug in Bun, not your code.

• pnpx
  pnpx @ember-data/codemods@canary apply migrate-to-schema --config=./example-codemod.config.json

pnpm: Command was killed with SIGSEGV (Segmentation fault): codemods apply migrate-to-schema --config=./example-codemod.config.json
at makeError (/Users/bobrimperator-mac/.volta/tools/image/packages/pnpm/lib/node_modules/pnpm/dist/pnpm.cjs:15358:17)
at handlePromise (/Users/bobrimperator-mac/.volta/tools/image/packages/pnpm/lib/node_modules/pnpm/dist/pnpm.cjs:15929:33)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async Object.handler [as dlx] (/Users/bobrimperator-mac/.volta/tools/image/packages/pnpm/lib/node_modules/pnpm/dist/pnpm.cjs:188580:9)
at async /Users/bobrimperator-mac/.volta/tools/image/packages/pnpm/lib/node_modules/pnpm/dist/pnpm.cjs:199444:23
at async main (/Users/bobrimperator-mac/.volta/tools/image/packages/pnpm/lib/node_modules/pnpm/dist/pnpm.cjs:199402:34)
at async runPnpm (/Users/bobrimperator-mac/.volta/tools/image/packages/pnpm/lib/node_modules/pnpm/dist/pnpm.cjs:199669:5)
at async /Users/bobrimperator-mac/.volta/tools/image/packages/pnpm/lib/node_modules/pnpm/dist/pnpm.cjs:199661:7

[BobrImperator]

Closing since we're able to get around this and regular users won't encounter this problem.

ulimt -s unlimited has also been documented in #10505