New files related to Gemini and update plans.

GEMINI.md

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+# Gemini Added Memories
+
+## Learnings from previous session (December 2, 2025):
+
+*   **Docker Environment Challenges:** Debugging issues in a Dockerized FastAPI environment when running locally (outside the container's execution context) is significantly more challenging due to environment mismatches and symlinked executables. Direct `uvicorn` execution for debugging is not viable in this setup. This necessitates an approach that can either:
+    *   Execute Python code snippets directly (e.g., for import validation).
+    *   Rely on external tools (like `curl` or `requests` from another script) to interact with the Dockerized API for runtime testing.
+    *   Assume that the Docker container provides the authoritative runtime environment, and local checks are primarily for static analysis (syntax, imports).
+*   **Need for Incremental Verification:** Given the complexity of the project and the debugging constraints, future changes must be exceptionally small, incremental, and verified through a robust testing strategy that can be executed, ideally, within the Docker environment or through isolated Python scripts.
+*   **Pydantic `BaseModel` Import:** Simple Pydantic `BaseModel` imports can be forgotten, leading to `NameError`. This highlights the need for automated linting or a minimal test harness that can quickly validate new model definitions in isolation.
+*   **Legacy Code vs. New Code:** When encountering errors, it's crucial to distinguish whether the error is in the new code being introduced or in existing legacy code that might have subtle interactions. The `422 Unprocessable Entity` errors were occurring in the legacy `/crud/` endpoints. This indicates that while our new factory code *itself* didn't cause those specific runtime errors, interactions or an underlying pre-existing issue became apparent when the application was loading.
+*   **`parent_table_name` for Nested CRUD:** The implementation detail of passing `parent_table_name` (or similar context) to child CRUD operations is essential for correctly linking nested resources in the database layer. The router factory's child object creation needs to pass this context explicitly.
+*   **API Endpoint Naming Convention:** The user prefers singular nouns for API endpoints (e.g., `/journal`, `/journal_entry`) over plural forms (e.g., `/journals`, `/journal_entries`). This convention will be followed for all new router creations.
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