docs: add refactoring implementation plan

TASKS.md

@@ -2,21 +2,27 @@
 
 ## Current
 
-### `feat/runtime-env-simplification`
+### `feat/refactoring-plan`
 
 Status: in_progress
 
 DoD:
-- runtime uses component-based PostgreSQL config as the primary model
-- `CRANK_BASE_URL` replaces split public URL variables
-- deployment uses one GitHub secret per runtime env variable
-- deprecated env variables are removed from compose, examples, and docs
+- `__REFACTORING.md` documents the full remediation plan for registry modularization, sqlx compile-time validation, KDF correction, typed timestamps, ID display support, pool tuning, and error normalization
+- `.gitignore` ignores local `__*.md` working notes and refactoring specs
+- `TASKS.md` points to the refactoring track as the active work item
 
 ## Next
 
-- `feat/websocket-test-run-polish`
+- `feat/postgres-registry-modularization`
 
 ## Backlog
 
+- `feat/postgres-registry-modularization`
+- `feat/sqlx-compile-time-verification`
+- `feat/typed-timestamps`
+- `feat/secret-crypto-hkdf`
+- `feat/id-display-support`
+- `feat/postgres-pool-config`
+- `feat/error-structure-normalization`
 - `feat/websocket-test-run-polish`
 - `feat/live-authenticated-staging-entry`