chore(release): bump to 0.7.0

Async client, BM25 hybrid retrieval, per-document TTL, Semantic Kernel
connector, search_many, optimistic concurrency, weighted graph edges,
client-side rate limiting, parallel put_vectors, and a graph node
metadata-preservation fix.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

chore(release): bump to 0.6.0

Query-expansion retrievers, learned RRF weights, OPQ/scalar quantization,
cross-encoder rerank, hybrid graph search + shortest path, search().explain(),
cache invalidation, embedding cache, S3Source, DynamoDB gzip, LlamaIndex
filters, and more.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

chore(release): bump to 0.5.0 (office ingestion, HF + DSPy, logging, …

…vectorized MMR)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

chore(release): bump to 0.4.0 (in-memory hot tier + more)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

chore(release): bump to 0.3.0 + add CHANGELOG

Cuts the 0.3.0 release: async embeddings, Mistral/Voyage/Bedrock-multimodal
embedders, SPFresh hot-tier, PDF ingestion, FastMCP server, telemetry
dashboard, max_pool_connections, and packaging/pagination/cache fixes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

site: add warm coral brand palette (matches benchmark charts)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>