v2.0.19

**Bug Fixes:**
- **Embeddings:** `HuggingFaceEmbedding` now falls back to the `HUGGINGFACE_API_KEY` env var, then a placeholder key, when `huggingface_base_url` is set and no `api_key` is configured. The OpenAI-compatible client used to talk to TEI endpoints raises at construction when no key resolves at all, so a TEI deployment that doesn't require a real key previously failed to initialize ([#6947](https://github.com/mem0ai/mem0/pull/6947))
- **Core:** `remove_code_blocks()` now accepts list-shaped content (a sequence of `{"text": ...}` blocks, as some agent frameworks pass) by joining each block's text before stripping code fences, instead of raising `AttributeError` from calling `.strip()` on a list ([#6947](https://github.com/mem0ai/mem0/pull/6947))
- **Core:** `create_procedural_memory()` (`Memory` and `AsyncMemory`) now raises a clear `ValueError` when the LLM returns no content for the summary, instead of continuing with empty content that surfaced as a confusing error further down the call ([#6947](https://github.com/mem0ai/mem0/pull/6947))
- **Proxy:** `mem0.proxy` no longer auto-installs `litellm` via a `pip install` subprocess when the import fails; it now raises `ImportError` with instructions to install it yourself. The auto-install could hang or fail silently in restricted environments and ran an unreviewed install on the caller's behalf ([#6947](https://github.com/mem0ai/mem0/pull/6947))
- **Client:** `get_all()` (sync and async) now sends `page` and `page_size` as independent query params instead of requiring both to be set before either was sent. Passing only `page_size` without `page` previously had it silently dropped, so results came back at the server's default page size ([#6900](https://github.com/mem0ai/mem0/pull/6900))
- **LLMs:** Add `provider_override` to `AWSBedrockConfig`, an explicit provider name (for example `"anthropic"`) for when `model` is an application inference profile ARN whose opaque ID has no provider substring for `extract_provider()` to detect. Without it, those ARNs raised `ValueError: Unable to determine provider` ([#6899](https://github.com/mem0ai/mem0/pull/6899))
- **LLMs:** `VllmConfig` now falls back to the `VLLM_BASE_URL` env var when `vllm_base_url` isn't passed explicitly. The default was filled in before the env var was ever checked, so `VLLM_BASE_URL` was silently ignored ([#6897](https://github.com/mem0ai/mem0/pull/6897))