fix: Kimi /coding thinking block survival + empty reasoning_content + block ordering

Follow-up to the cherry-picked PR #13897 fix. Three issues found:

1. CRITICAL: The thinking block synthesised from reasoning_content was
   immediately stripped by the third-party signature management code
   (Kimi is classified as _is_third_party_anthropic_endpoint). Added a
   Kimi-specific carve-out that preserves unsigned thinking blocks while
   still stripping Anthropic-signed blocks Kimi can't validate.

2. Empty-string reasoning_content was silently dropped because the
   truthiness check ('if reasoning_content and ...') evaluates to False
   for ''. Changed to 'isinstance(reasoning_content, str)' so the
   tier-3 fallback from _copy_reasoning_content_for_api (which injects
   '' for Kimi tool-call messages with no reasoning) actually produces
   a thinking block.

3. The thinking block was appended AFTER tool_use blocks. Anthropic
   protocol requires thinking -> text -> tool_use ordering. Changed to
   blocks.insert(0, ...) to prepend.

scripts/release.py

@@ -96,6 +96,7 @@ AUTHOR_MAP = {
     "nocoo@users.noreply.github.com": "nocoo",
     "30841158+n-WN@users.noreply.github.com": "n-WN",
     "tsuijinglei@gmail.com": "hiddenpuppy",
+    "jerome@clawwork.ai": "HiddenPuppy",
     "leoyuan0099@gmail.com": "keyuyuan",
     "bxzt2006@163.com": "Only-Code-A",
     "i@troy-y.org": "TroyMitchell911",