feat: add DeepSeek and NVIDIA NIM providers

- Add deepseek and nvidia entries to gateway-provider config

- Add DEEPSEEK_API_KEY and NVIDIA_API_KEY to .env.example

- Add deepseek and nvidia to doctor's LLM provider check

- Fix remaining harness-log → log-message reference

docs/CONTRIBUTING.org

@@ -1,10 +1,10 @@
-#+TITLE: Contributing to OpenCortex
-#+AUTHOR: OpenCortex Contributors
+#+TITLE: Contributing to Passepartout
+#+AUTHOR: Passepartout Contributors
 #+STARTUP: content
 #+FILETAGS: :docs:contributing:
 
 * Philosophy
-OpenCortex is built on a "Zero-Bloat" mandate. The core kernel is mathematically pure, pushing all peripheral logic, API integrations, and routing to hot-reloadable "Skills".
+Passepartout is built on a "Zero-Bloat" mandate. The core kernel is mathematically pure, pushing all peripheral logic, API integrations, and routing to hot-reloadable "Skills".
 
 * Literate Granularity
 We strictly adhere to Literate Programming using Org-mode.
@@ -14,7 +14,7 @@ We strictly adhere to Literate Programming using Org-mode.
 - Every architectural decision, constraint, and implementation detail must be documented alongside the code in the `.org` file.
 
 * Skill Creation Standard
-Skills are the building blocks of OpenCortex. They reside in the `skills/` directory.
+Skills are the building blocks of Passepartout. They reside in the `skills/` directory.
 
 A skill must define:
 1. *Trigger*: A lambda determining if the skill should activate based on the context.
@@ -40,5 +40,5 @@ All inter-process communication occurs via the Unified Envelope. Do not use lega
 1. Ensure your working tree is clean.
 2. Write tests for your skill in `tests/`.
 3. Tangle all files.
-4. Run the test suite: `sbcl --eval "(asdf:test-system :opencortex)"`.
+4. Run the test suite: `sbcl --eval "(asdf:test-system :passepartout)"`.
 5. Submit a PR outlining the architectural intent and the specific Literate changes.