fix: restore changes dropped by the upstream sync merge

The manual v0.3.6 sync (22132a4) was incomplete, and the follow-up merge
(d803ae2) resolved conflicts in favour of that copy, silently reverting three
shipped changes. main is already an ancestor of this branch, so re-merging
cannot bring them back; restore them explicitly.

- schema.sql: re-add the idempotent llm_profiles_format_check migration.
  CREATE TABLE IF NOT EXISTS leaves an existing table alone, so databases
  created before openai-responses kept the old two-value CHECK and rejected
  every openai-responses profile.
- orchestration.go: re-add the reseedPlannerPrompt/reseedWorkerPrompt calls,
  dropped by a comment-alignment hunk while the functions stayed behind as
  dead code. Without them existing installs never receive the quantified
  acceptance check or the negative-conclusion evidence threshold.
- CHANGELOG.md: restore the 0.3.6 entries, the @neouks credit and the correct
  norma version range.

Also close three recovery gaps in the new cold-archive path:

- traffic: write the staging journal even when no legacy host directory
  exists. Modern installs keep traffic in SQLite only, so a crash between the
  PostgreSQL commit and the SQLite commit left the archived task's exclusive
  traffic in the hot store with nothing for recovery to act on.
- recoverTaskArchiveStages: treat a missing journal.json as a discardable
  directory instead of an error, which used to set recoveryFailed and stop the
  archive worker from starting for the rest of the process lifetime.
- stageTaskArchiveFiles: replay the journal's renames when resuming an
  existing staging root. The journal is written before the first rename, so
  its presence did not guarantee a complete payload, and a resumed round could
  package an archive missing transcripts or workspace files.

db/schema.sql

@@ -324,6 +324,11 @@ ALTER TABLE llm_profiles ADD COLUMN IF NOT EXISTS priority     INTEGER NOT NULL
 ALTER TABLE llm_profiles ADD COLUMN IF NOT EXISTS pool_exclude BOOLEAN NOT NULL DEFAULT false;
 -- 流式开关；补旧库。默认 true = 保持既有的流式行为，旧配置无感升级。
 ALTER TABLE llm_profiles ADD COLUMN IF NOT EXISTS streaming    BOOLEAN NOT NULL DEFAULT true;
+-- 放开 format 约束以容纳 openai-responses(OpenAI Responses API)；补旧库。
+-- 每次启动执行,幂等:先删旧 CHECK 再建含三值的新 CHECK。
+ALTER TABLE llm_profiles DROP CONSTRAINT IF EXISTS llm_profiles_format_check;
+ALTER TABLE llm_profiles ADD  CONSTRAINT llm_profiles_format_check
+    CHECK (format IN ('openai','anthropic','openai-responses'));
 
 -- 思考开关字段 thinking_type，从旧的单一 reasoning_effort 语义一次性拆分而来。
 -- schema.sql 每次启动都执行，故迁移必须只跑一次：仅当该列尚不存在时才回填，