Fix CI failures surfaced by the phase-1 matrix: legal-semantic-search (ERESOLVE) + pinecone-assistant (next lint)

[jhamon]

The new per-app CI matrix (#77) is doing its job — it surfaced two pre-existing broken apps. Both need per-app remediation, tracked here so #77 isn't scope-crept.

1. legal-semantic-search — npm ci ERESOLVE

While resolving: @langchain/community@0.3.59
Found: openai@undefined
  openai@"file:langchain/llms/openai" from the root project
  peer openai@"*" from @langchain/community@0.3.59
Conflicting peer dependency: openai@4.104.0
  peer openai@"^4.62.1" from @browserbasehq/stagehand@1.14.0

Root cause: the app pins openai to a local file:langchain/llms/openai path that resolves to openai@undefined, which can't satisfy the openai peer ranges required by @langchain/community / @browserbasehq/stagehand. Fix: drop the bogus file: openai override, install a real openai version that satisfies the peers, and regenerate the lockfile.

2. pinecone-assistant — pnpm run lint fails

next lint detects TypeScript and tries to reconfigure tsconfig.json on first run, then exits 1 in CI:

We detected TypeScript in your project and reconfigured your tsconfig.json file for you.
 Cancel ELIFECYCLE  Command failed with exit code 1.

Fix: commit the next lint-reconciled tsconfig.json (and next-env.d.ts) so the first-run reconfigure doesn't happen in CI, or run a non-interactive lint.

Context

Surfaced during a PR-feedback autofix pass on #77. Deferred out of that PR because each is real app-dependency/config remediation requiring per-app decisions, not part of adding the workflow.