docs: correct release date and note the vector-planner caveat

The 0.10.0 heading carried the date the entry was drafted, not the
release date. The entry also implied a vector index accelerates queries;
verification against api.hotdata.dev found it does not currently do so on
a managed database, so the entry now says what was observed.

Author: rohan-hotdata

CHANGELOG.md

@@ -8,7 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 
-## [0.10.0] - 2026-08-06
+## [0.10.0] - 2026-08-07
 
 ### Added
 
@@ -50,6 +50,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `metric`/`dimensions`/`embedding_provider_id`/`output_column`/`description` on a
   non-vector index.
 
+  Verified against `api.hotdata.dev` when this version was released: BM25 and vector
+  indexes both build and report `ready`, and a BM25 index is used by full-text
+  search. A *vector* index on a managed database was **not** picked up by the query
+  planner at that time — a matching `cosine_distance(...) ORDER BY ... LIMIT k` still
+  planned as a full scan. That reproduces with an index created by `hotdata indexes
+  create`, so it is an engine-side issue rather than a client one, but it means a
+  vector index built through this method may not yet accelerate queries.
+
 - `CreateIndexResult`, the frozen dataclass `create_index` returns, is exported from
   `hotdata_framework` and added to the public contract surface. Its `source_column`
   names the text column to query for a provider-backed vector index, and is `None`

README.md

@@ -16,7 +16,7 @@ Runtime boundary and guarantees are defined in `CONTRACT.md`.
 - **Result utilities** — convert query results to records, pandas DataFrames, or metadata dictionaries for adapter display layers.
 - **History helpers** — list recent results and query run history with normalized dataclasses.
 - **Managed databases** — create Hotdata-owned catalogs, declare tables, upload parquet, and load managed tables (mirrors `hotdata databases` in the CLI).
-- **Indexes** — build BM25, vector, or sorted indexes on managed tables (parity with `hotdata indexes create`), waiting on the background build and surfacing its failure instead of reporting a phantom success.
+- **Indexes** — build BM25, vector, or sorted indexes on managed tables, mirroring `hotdata indexes create` (managed databases only). Waits on the background build job and surfaces its failure, instead of reporting the phantom success the submit call returns.
 - **Health helpers** — build compact API/workspace health summaries for UI integrations.
 
 Install: