Update: 将子项目从 submodule 转为完整内容

- 移除 GovAI, nomifun-tauri, 算力盒子 的 submodule 引用
- 添加所有子项目的完整源代码
- 保留原始 .git 为 .git.bak 备份

nomifun-tauri/crates/backend/nomifun-db/migrations/002_knowledge_writeback_eagerness.sql

@@ -0,0 +1,20 @@
+-- Migration 002: write-back "eagerness" (回写意识) for knowledge bindings.
+--
+-- Adds a SECOND, orthogonal write-back axis to `knowledge_bindings`. The
+-- existing `writeback_mode` controls WHERE agent writes land (`staged` inbox
+-- vs `direct` body); this new `writeback_eagerness` controls HOW EAGERLY the
+-- agent writes at all, while write-back is enabled:
+--   * 'conservative' — the historical, restrained default: only persist
+--     knowledge the model judges clearly worth keeping.
+--   * 'aggressive'    — capture anything plausibly relevant to a mounted base
+--     without much hesitation; the user prunes later.
+-- Both are purely prompt-contract wording (rendered by
+-- nomifun-knowledge::context); the column only persists the user's pick.
+--
+-- Additive on purpose: editing 001_baseline would change its checksum and
+-- trip the pre-baseline rebuild path (database.rs), wiping existing dev DBs.
+-- SQLite allows ADD COLUMN with a NOT NULL DEFAULT + CHECK; the default
+-- satisfies the CHECK for every pre-existing row.
+ALTER TABLE knowledge_bindings
+    ADD COLUMN writeback_eagerness TEXT NOT NULL DEFAULT 'conservative'
+        CHECK(writeback_eagerness IN ('conservative', 'aggressive'));