fix(docker): fetch arm64 prisma schema-engine for non_root image

[moicalcob]

Problem

The arm64 variant of litellm-non_root ships the arm64 query engine but no arm64 schema-engine — only schema-engine-debian-openssl-3.0.x (amd64). As a result, on Apple-Silicon / arm64 hosts prisma migrate deploy fails at boot:

Error: Could not find schema-engine binary. Searched … schema-engine-linux-arm64-openssl-3.0.x

litellm boots (the arm64 query engine connects, so queries run) but the DB is never migrated — every LiteLLM_* table is missing, and any flow that touches them 401/500s. amd64 (CI, prod) is unaffected, which is why this only bites local arm64 dev.

Root cause

On the Wolfi base, prisma-client-py's platform detection is arch-blind:

# prisma/binaries/platform.py
def binary_platform() -> str:
    distro = linux_distro()           # Wolfi isn't alpine/rhel -> "debian"
    ...
    return f'{distro}-openssl-{ssl}'  # -> "debian-openssl-3.0.x"  (no arm64/amd64!)

So the build resolves the schema-engine platform to debian-openssl-3.0.x (the amd64 binary) on both arches. The query engine escapes this only because schema.prisma's binaryTargets includes "native", which resolves the true arch.

Fix

Name the arm64 target explicitly in PRISMA_CLI_BINARY_TARGETS (both build + runtime stages) so the build-time online fetch pulls the arm64 schema-engine alongside the debian one:

-    PRISMA_CLI_BINARY_TARGETS="debian-openssl-3.0.x" \
+    PRISMA_CLI_BINARY_TARGETS="debian-openssl-3.0.x,linux-arm64-openssl-3.0.x" \

amd64 is unchanged (debian engine still fetched); the extra arm64 engine on the amd64 image is a few MB of harmless dead weight (could be made arch-aware via ARG TARGETARCH if preferred — happy to switch).

Verification

Built --target builder --platform linux/arm64 with the change and inspected the image:

/app/.cache/.../@prisma/engines/schema-engine-debian-openssl-3.0.x        # amd64 (kept)
/app/.cache/.../@prisma/engines/schema-engine-linux-arm64-openssl-3.0.x   # NEW, arm64
$ schema-engine-linux-arm64-openssl-3.0.x --version
schema-engine-cli ac9d7041…    # execs natively on aarch64

With this, the arm64 image self-migrates on boot (USE_PRISMA_MIGRATE=true) — no amd64 emulation needed for local dev.

🤖 Generated with Claude Code