feat(prisma): add sqlcommenter-prisma package

[ChrisHarris2012]

Summary

• Adds @query-doctor/sqlcommenter-prisma — SQLCommenter integration for Prisma ORM
• Automatically appends query metadata (db_driver, route, method, file) as SQL comments to all Prisma queries via driver adapter wrapping
• Supports Prisma 6+ SqlDriverAdapterFactory pattern (wrapAdapterFactory) and the legacy SqlDriverAdapter pattern (wrapAdapter)
• Bridges AsyncLocalStorage context across Prisma's WASM engine boundary so request context and call-site info survive to the adapter layer
• Includes unit tests for adapter wrapping, tag serialization, transactions, and path resolution

Key design decisions

• In-place monkey-patching over Object.create() — Prisma's LibraryEngine tracks adapter errors by object identity; a new wrapper object breaks the error registry
• WASM context bridge — Prisma's Rust/WASM query engine does not preserve Node.js AsyncLocalStorage context when calling back into JS. The extension snapshots ALS stores into module-level variables before the WASM call; the adapter reads them as a fallback
• withRequestContext returns the inner promise — callers can properly await the result and errors propagate correctly

Test plan

• npm test passes in packages/sqlcommenter-prisma
• Verify with demo app: queries show db_driver, route, method, file annotations
• Test wrapAdapterFactory with PrismaPg on Prisma 6.x
• Test wrapAdapter with direct SqlDriverAdapter (Prisma 5.x compat)

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