docs(changelog): cover M365 Copilot provider (#5302) + targetExhaustion tests (#5296)

CHANGELOG.md

@@ -21,6 +21,7 @@ _In development — bullets added per PR; finalized at release._
 - **feat(compression): QuantumLock cache-prefix stabilization (opt-in, default off)** — recovers upstream prompt-cache hits that a volatile fragment in the system prompt would otherwise bust. When a caller injects a session UUID, unix timestamp, request-id, JWT, API-key shape, or long hex digest into the `role:system` message every turn, the longest common prefix across turns ends at that changing byte → the whole system prompt after it is re-billed and re-processed each turn. QuantumLock replaces each non-semantic volatile fragment with a **positional, value-independent** placeholder `⟦Q{i}⟧` and appends the real values in a delimited `⟦QUANTUMLOCK⟧` tail. The rewrite is **sent to the model** (lossless — not restored), so the system-prompt body becomes **byte-identical across turns** and the provider caches the long stable prefix while only the small tail differs. Opt-in, default off, applied only for caching providers (`isCachingProvider && config.quantumLock.enabled`); bounded ReDoS-safe patterns; idempotent; **no date/time patterns** (semantically meaningful — explicit non-goal). Studio gets a toggle + a "🔒 N volatile fragment(s) stabilized" dry-run badge. Seventh item of the compression feature-extraction roadmap (bench: [#5080](https://github.com/diegosouzapw/OmniRoute/pull/5080), gate: [#5127](https://github.com/diegosouzapw/OmniRoute/pull/5127), fuzzy: [#5143](https://github.com/diegosouzapw/OmniRoute/pull/5143), ionizer: [#5148](https://github.com/diegosouzapw/OmniRoute/pull/5148), TOON: [#5163](https://github.com/diegosouzapw/OmniRoute/pull/5163), CCR ranged: [#5187](https://github.com/diegosouzapw/OmniRoute/pull/5187), risk-gate: [#5243](https://github.com/diegosouzapw/OmniRoute/pull/5243)). ([#5260](https://github.com/diegosouzapw/OmniRoute/pull/5260))
 - **kilocode:** anonymous (no-auth) access to Kilo Code's free models, mirroring the `opencode`/`mimocode` pattern. With no Kilo account connected, requests now fall back to the gateway's anonymous tier (`Authorization: Bearer anonymous` on `api.kilo.ai/api/openrouter`) so the free models work without signup; a connected OAuth account is still used unchanged for the paid tier ([#5259](https://github.com/diegosouzapw/OmniRoute/pull/5259), #4019 — thanks @Theadd for the reference implementation)
 - **feat(logging): call-log correlation ID (end-to-end)** — every request now gets a unique correlation id, returned in the `X-Correlation-Id` response header, persisted in `call_logs` (migration **109**), filterable via `/api/usage/call-logs`, and surfaced in the dashboard request logger (per-chunk stream timestamps + active-requests-first sort). This is the safe, cohesive core subset of the larger #5275 — landed on its own so the low-risk value isn't blocked by the parts of that PR still under review. ([#5279](https://github.com/diegosouzapw/OmniRoute/pull/5279) — thanks @hartmark)
+- **feat(providers): Microsoft 365 Copilot individual provider** — adds the `copilot-m365-web` provider (the 237th), wiring the M365 BizChat framing/connection helpers into a selectable web-session provider backed by `m365.cloud.microsoft/chat` for individual Microsoft 365 plans. Builds on the M365 pure-framing groundwork from #4696. Regression guard: `tests/unit/copilot-m365-web-executor.test.ts`. ([#5302](https://github.com/diegosouzapw/OmniRoute/pull/5302) — thanks @skyzea1)
 
 ### 🔧 Bug Fixes
 
@@ -73,6 +74,7 @@ _In development — bullets added per PR; finalized at release._
 - **docker:** harden the base image against container-scan CVEs and skip comment lines in the #4076 builder heap-ordering check. ([#5229](https://github.com/diegosouzapw/OmniRoute/pull/5229), [#5233](https://github.com/diegosouzapw/OmniRoute/pull/5233))
 - **ci:** Trivy advisory scan now ignores unfixed CVEs to cut Security-tab noise. ([#5235](https://github.com/diegosouzapw/OmniRoute/pull/5235))
 - **test(combo):** reconcile the #4279 stop-guard test with the #5249 advance policy. ([#5300](https://github.com/diegosouzapw/OmniRoute/pull/5300))
+- **test(targets):** add 14 unit tests for the shared `combo/targetExhaustion.ts` handler (provider-exhausted / connection-error / transient rate-limited classification), registered in the vitest discovery list. ([#5296](https://github.com/diegosouzapw/OmniRoute/pull/5296) — thanks @KooshaPari)
 
 ---