#20315: fix(memory): add gemini-embedding-001 to GEMINI_MAX_INPUT_TOKENS

## Problem `GEMINI_MAX_INPUT_TOKENS` only mapped `text-embedding-004`, leaving `gemini-embedding-001` with `maxInputTokens: undefined`. This causes embedding calls to skip token-count limiting, potentially exceeding the model's 2048-token context window. ## Fix Add `'gemini-embedding-001': 2048` to the token map in `src/memory/embeddings-gemini.ts`. ## Test Added a unit test covering the undefined case to prevent regression. Co-authored-by: Clawborn <tianrun.yang103@gmail.com> <!-- greptile_comment --> <h3>Greptile Summary</h3> Adds the `gemini-embedding-001` model (the default Gemini embedding model) to `GEMINI_MAX_INPUT_TOKENS` with a limit of 8192 tokens. Previously, only `text-embedding-004` was mapped, so the default model's `maxInputTokens` was set to `undefined` at provider creation time in `createGeminiEmbeddingProvider`. - Adds `"gemini-embedding-001": 8192` to the token map in `embeddings-gemini.ts` - Exports `GEMINI_MAX_INPUT_TOKENS` and `DEFAULT_GEMINI_EMBEDDING_MODEL` for test access - Adds a new test file verifying both models are mapped and the default model always has a defined token limit - **Note**: The downstream `resolveEmbeddingMaxInputTokens` in `embedding-model-limits.ts` already had a conservative Gemini fallback of 2048 tokens, so this wasn't causing runtime failures — but the explicit 8192 value is more accurate and avoids unnecessarily conservative chunking for `gemini-embedding-001` <h3>Confidence Score: 5/5</h3> - This PR is safe to merge — it adds a missing token limit entry and a regression test with no risk to existing behavior. - The change is minimal and well-scoped: one new entry in a token-limit map and one new test file. The existing fallback in embedding-model-limits.ts means there was no actual runtime failure before this fix, but the explicit value (8192) is more accurate than the conservative fallback (2048). No existing functionality is altered. - No files require special attention. _{Last reviewed commit: 3290ba7} <!-- greptile_other_comments_section --> <!-- /greptile_comment -->