chore: release v1.26.0

Add context routing and v1.25.0 entries to CHANGELOG.

Author: jpr5

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## [1.26.0] - 2026-05-18
+
 ### Added
 
 - **Timing-aware recording and replay** — proxy recording captures per-frame
@@ -13,6 +15,12 @@
   sources (recorded timings, streaming profiles, global latency). Per-fixture
   `replaySpeed` override. Covers SSE, NDJSON, Bedrock EventStream, and
   WebSocket protocols.
+- **Context-based fixture routing** — `X-AIMock-Context` header scopes fixtures per integration. Fixtures with `match.context` only match requests carrying that context; fixtures without `context` remain shared. Recorder auto-captures context and routes recorded fixtures into context subdirectories.
+
+## [1.25.0] - 2026-05-18
+
+### Added
+
 - **Gemini `embedContent` endpoint** — `POST /v1beta/models/{model}:embedContent`
   with deterministic fallback embeddings and fixture matching
 - **`/v1/images/edit` and `/v1/images/variations` endpoints** — multipart