fix: passthrough provider template + fix (#1612)

# What does this PR do?

- Fix issue w/ passthrough provider


[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan
llama stack run

[//]: # (## Documentation)

docs/source/distributions/self_hosted_distro/passthrough.md

@@ -0,0 +1,42 @@
+---
+orphan: true
+---
+<!-- This file was auto-generated by distro_codegen.py, please edit source -->
+# Passthrough Distribution
+
+```{toctree}
+:maxdepth: 2
+:hidden:
+
+self
+```
+
+The `llamastack/distribution-passthrough` distribution consists of the following provider configurations.
+
+| API | Provider(s) |
+|-----|-------------|
+| agents | `inline::meta-reference` |
+| datasetio | `remote::huggingface`, `inline::localfs` |
+| eval | `inline::meta-reference` |
+| inference | `remote::passthrough`, `inline::sentence-transformers` |
+| safety | `inline::llama-guard` |
+| scoring | `inline::basic`, `inline::llm-as-judge`, `inline::braintrust` |
+| telemetry | `inline::meta-reference` |
+| tool_runtime | `remote::brave-search`, `remote::tavily-search`, `remote::wolfram-alpha`, `inline::code-interpreter`, `inline::rag-runtime`, `remote::model-context-protocol` |
+| vector_io | `inline::faiss`, `remote::chromadb`, `remote::pgvector` |
+
+
+### Environment Variables
+
+The following environment variables can be configured:
+
+- `LLAMA_STACK_PORT`: Port for the Llama Stack distribution server (default: `5001`)
+- `PASSTHROUGH_API_KEY`: Passthrough API Key (default: ``)
+- `PASSTHROUGH_URL`: Passthrough URL (default: ``)
+
+### Models
+
+The following models are available by default:
+
+- `llama3.1-8b-instruct `
+- `llama3.2-11b-vision-instruct `