Update changelogs from fern repo (#5217)

Co-authored-by: dsinghvi <10870189+dsinghvi@users.noreply.github.com>

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-04-28.mdx

@@ -1,3 +1,13 @@
+## 4.107.0
+**`(feat):`** Add `infer-discriminated-union-base-properties` OpenAPI parser setting.
+When enabled, the parser intersects the resolved (allOf-flattened) property
+maps of every variant of a discriminated `oneOf` and lifts properties that
+appear in all variants with structurally-equal schemas into the union's
+common properties. SDKs (e.g. C#, Java, Go) that already support union base
+properties can then expose those shared fields directly on the union type
+without forcing callers to cast to a concrete variant. Defaults to false.
+
+
 ## 4.106.3
 **`(fix):`** Send `gitattributesEntries` to Fiddle on `fern replay init` so the
 generated PR marks `.fern/replay.lock` as `linguist-generated=true`.

fern/products/sdks/generators/python/changelog/2026-04-28.mdx

@@ -1,3 +1,10 @@
+## 5.8.3
+**`(fix):`** Fix async SSE parsing to only split on SSE-spec line terminators (\n, \r, \r\n).
+Previously, aiter_sse() used httpx's aiter_lines() which splits on \u2028 and
+\u2029 via Python's str.splitlines(), corrupting data fields containing those
+characters (common in LLM JSON output).
+
+
 ## 5.8.2
 **`(chore):`** Bump @fern-api/generator-cli to 0.9.16, which bundles the autoversion
 pipeline's private workspace deps (@fern-api/logging-execa,