[CLEAN] Synthetic Benchmark PR #26622 - chore: USE_POOL env var for api v2 prisma pooling

[tomerqodo]

Benchmark PR calcom#26622

Type: Clean (correct implementation)

Original PR Title: chore: USE_POOL env var for api v2 prisma pooling
Original PR Description: ## What does this PR do?

Adds a USE_POOL env var to toggle Prisma connection pooling in API v2. When disabled (USE_POOL=false), Prisma connects directly via datasourceUrl instead of using the pg Pool. This provides flexibility for environments where connection pooling may not be desired.

Key Changes

• Introduced db.usePool config sourced from USE_POOL env var (default: true)
• PrismaReadService and PrismaWriteService now conditionally use PrismaPg + pg Pool or direct PrismaClient based on usePool
• Added USE_POOL to env types and updated workers/main modules to read pool sizes with radix 10
• Adjusted biome config to allow process.env usage within apps/api/v2 (specific files only)
• Removed node:process imports in favor of global process (required for NestJS compatibility)

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• N/A I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. If N/A, write N/A here and check the checkbox.
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

1. Set USE_POOL=true (or omit it) and verify API v2 uses connection pooling
2. Set USE_POOL=false and verify API v2 connects directly without pooling
3. Run existing API v2 tests to ensure no regressions

Checklist for Human Review

• Verify the conditional pooling logic in PrismaReadService and PrismaWriteService handles both modes correctly
• Confirm biome config changes don't inadvertently disable linting rules for unintended files
• Verify removal of node:process imports doesn't cause runtime issues in NestJS context

Updates since last revision

• Fixed duplicate entry in biome.json includes array (apps/api/v2/src/config/app.ts was listed twice)

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Link to Devin run: https://app.devin.ai/sessions/f86d6319617546c8be13351466d34332
Original PR URL: calcom#26622

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