ent-v2.2.2-base

## What's Changed
* streaming gate fixes by @akshaydeo in https://github.com/maximhq/bifrost/pull/7331
* stream gate memory fixes by @akshaydeo in https://github.com/maximhq/bifrost/pull/7332
* adds more gating test cases by @akshaydeo in https://github.com/maximhq/bifrost/pull/7333
* enterprise docs by @akshaydeo in https://github.com/maximhq/bifrost/pull/7334
* enterprise docs by @akshaydeo in https://github.com/maximhq/bifrost/pull/7335
* feat: extract session stickiness into a pluggable `SessionAffinity` interface with scoped, identity-aware key bindings by @Pratham-Mishra04 in https://github.com/maximhq/bifrost/pull/7176
* feat: route and key session affinity driven by observed outcomes, with `x-bf-session-affinity` header opt-out by @Pratham-Mishra04 in https://github.com/maximhq/bifrost/pull/7177
* feat: add `BifrostContextKeySessionAffinity` for per-request session affinity control and document provider-level session binding behavior by @Pratham-Mishra04 in https://github.com/maximhq/bifrost/pull/7178
* refactor: export `SessionStateKey`, `SessionAffinity`, and related helpers; unify complexity session keying under shared session state by @Pratham-Mishra04 in https://github.com/maximhq/bifrost/pull/7179
* docs: add Session Affinity guide and cross-link it from routing, CLI agent, and request-options docs by @Pratham-Mishra04 in https://github.com/maximhq/bifrost/pull/7210
* fix: record session affinity agreement with routing in trail and engines-used, log unweighted provider exclusions, clarify docs by @Pratham-Mishra04 in https://github.com/maximhq/bifrost/pull/7289
* [fix]: preserve API web search source names by @g-yixuan in https://github.com/maximhq/bifrost/pull/7358
* fix(anthropic): carry allowed_tools and parallel_tool_calls into the request by @basil-k-aji-dev in https://github.com/maximhq/bifrost/pull/7348
* fix(bedrock): keep cache_control when a message's content is a string by @basil-k-aji-dev in https://github.com/maximhq/bifrost/pull/7360
* dependabot cleanups by @akshaydeo in https://github.com/maximhq/bifrost/pull/7378
* fix: allow all providers access and api models response by @TejasGhatte in https://github.com/maximhq/bifrost/pull/7375
* typesafe models support, new decisions endpoint by @akshaydeo in https://github.com/maximhq/bifrost/pull/7355
* feat(decision): emulate decisions via LLM tool-calling for all providers by @akshaydeo in https://github.com/maximhq/bifrost/pull/7361
* benchmarking and api struct fixes by @akshaydeo in https://github.com/maximhq/bifrost/pull/7384
* fix: removes unnecessary allocations from compat plugin by @sammaji in https://github.com/maximhq/bifrost/pull/7097
* fix: strip bedrock cachepoint markers for non-bedrock providers while preserving them for fallbacks by @sammaji in https://github.com/maximhq/bifrost/pull/7182
* adds bedrock unknown json document handling by @akshaydeo in https://github.com/maximhq/bifrost/pull/7396
* [fix]: preserve Grok 4.7 xhigh reasoning effort by @nettee in https://github.com/maximhq/bifrost/pull/7403
* docs: add prompt deployment docs by @roroghost17 in https://github.com/maximhq/bifrost/pull/7420
* adds safeguard support for passthrough requests by @akshaydeo in https://github.com/maximhq/bifrost/pull/7393
* memory fixes for streaming cancellation by @akshaydeo in https://github.com/maximhq/bifrost/pull/7406
* fix(responses): stop rewriting OpenAI computer tool to computer_use_preview by @abhishekgahlot2 in https://github.com/maximhq/bifrost/pull/7426
* perf: avoid redundant JSON decoding in Responses requests by @G-XD in https://github.com/maximhq/bifrost/pull/7412
* fix(schemas): deep copy extended Responses fields in DeepCopyResponsesMessage by @Madhuvod in https://github.com/maximhq/bifrost/pull/7422
* ci: add CodSpeed performance benchmarks for the request hot path by @codspeed[bot] in https://github.com/maximhq/bifrost/pull/7409
* readact anthropic billing headers to avoid cache spoiling by @akshaydeo in https://github.com/maximhq/bifrost/pull/7431
* kimi and deepseek support for claude code by @akshaydeo in https://github.com/maximhq/bifrost/pull/7430
* fix: claude opus 5-5 changes by @TejasGhatte in https://github.com/maximhq/bifrost/pull/7433
* fix: restore `HTTP_PROXY`/`HTTPS_PROXY` support for MCP connections while blocking link-local targets via pre-proxy destination guard by @Pratham-Mishra04 in https://github.com/maximhq/bifrost/pull/7437
* test fixes by @akshaydeo in https://github.com/maximhq/bifrost/pull/7440
* fix: computer toolset compatibility by @TejasGhatte in https://github.com/maximhq/bifrost/pull/7434
* fix: computer toolset model capability by @TejasGhatte in https://github.com/maximhq/bifrost/pull/7441
* v2.2.2 by @akshaydeo in https://github.com/maximhq/bifrost/pull/7442
* changelogs for 2.2.2 by @akshaydeo in https://github.com/maximhq/bifrost/pull/7443
* adds preamble support for all openai model family by @akshaydeo in https://github.com/maximhq/bifrost/pull/7444
* preamble support for openai model family across the providers by @akshaydeo in https://github.com/maximhq/bifrost/pull/7445
* docs fixes by @akshaydeo in https://github.com/maximhq/bifrost/pull/7447

## New Contributors
* @g-yixuan made their first contribution in https://github.com/maximhq/bifrost/pull/7358
* @basil-k-aji-dev made their first contribution in https://github.com/maximhq/bifrost/pull/7348
* @abhishekgahlot2 made their first contribution in https://github.com/maximhq/bifrost/pull/7426
* @codspeed[bot] made their first contribution in https://github.com/maximhq/bifrost/pull/7409

**Full Changelog**: https://github.com/maximhq/bifrost/compare/ent-v2.2.1-base...ent-v2.2.2-base