docs(changelog): scrub profile-field noise [skip-runtime-e2e] (#34)

The profile field added in PR #2013 / SDK PR #161 work was removed in
PR #33 before any v0.2.0 tag shipped to crates.io. Customer-facing
CHANGELOG should reflect what users experience, not internal flaps.

Net effect of this scrub:
- Delete the [0.2.1] CHANGELOG section entirely.
- Revert version bump 0.2.1 → 0.2.0 in Cargo.toml.
- Cargo.lock refreshed via cargo build.

The [0.2.0] section already had no profile mentions (Rust SDK never
shipped the field standalone — Session C's v0.2.0 came in fresh after
the v1 schema work, and PR #33 reverted it before tag).

Code state unchanged — main has the post-#33 telemetry surface.

Signed-off-by: Saurabh Jain <saurabhjain1592@gmail.com>

Author: saurabhjain1592

CHANGELOG.md

@@ -7,12 +7,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [0.2.1] - 2026-05-08
-
-### Removed
-
-- Telemetry `profile` field — collided with the existing `AXONFLOW_PROFILE` governance env var (`platform/agent/profile.go`, ADR-036), which has been the canonical lever for selecting policy-enforcement profile (`dev` / `default` / `strict` / `compliance`) since v6. Reusing the same env var as a free-form telemetry dimension would have caused the v1 telemetry validator to reject any value outside `dev` / `prod` / `unknown` while the governance engine accepted its own four-value allowlist — a customer-visible HTTP 400 on every `AXONFLOW_PROFILE=strict` deployment. The dimension also had no consumer in the central pipeline (no aggregator, no daily-report column, no dashboard), and `deployment_mode` already covers the topology axis it was meant to add. `AXONFLOW_PROFILE` reverts to its single original purpose; the SDK no longer reads it for telemetry.
-
 ## [0.2.0] - 2026-05-08 — Decision history API + central telemetry parity
 
 **Preview release.** The headline feature is the new decision-history client API

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "axonflow-sdk-rust"
-version = "0.2.1"
+version = "0.2.0"
 edition = "2021"
 rust-version = "1.78"
 description = "Rust SDK for the AxonFlow AI governance platform"