chore: initialize EverOS 1.0.0

md-first memory extraction framework for AI agents.

Markdown is the single source of truth; SQLite holds state and LanceDB
provides the rebuildable vector + BM25 + scalar index. The codebase follows
a single-direction DDD layering (entrypoints -> service -> memory -> infra,
with component / core / config cross-cutting) enforced by import-linter.

Engineering surface:
- Coding conventions in .claude/rules/ (path-scoped) and workflows in
  .claude/skills/ (/commit, /new-branch, /pr).
- GitHub Actions CI runs make lint + test + integration; pre-commit mirrors
  the gates locally (ruff, hygiene hooks, gitlint commit-msg).
- Commit messages follow Conventional Commits, enforced by gitlint.
- make lint also enforces datetime two-zone discipline and OpenAPI drift.

.claude/rules/async-programming.md

@@ -0,0 +1,21 @@
+---
+paths:
+  - "src/**/*.py"
+  - "tests/**/*.py"
+---
+
+# Async programming rule
+
+The write/read paths are async end-to-end. Keep them non-blocking.
+
+- **No blocking calls in async functions** — no synchronous file I/O, no `time.sleep`,
+  no blocking DB/network calls inside `async def`. Ruff `ASYNC` flags the common cases.
+- **Offload CPU/blocking work** with `anyio.to_thread.run_sync` (or the established
+  helper) rather than blocking the event loop.
+- **Concurrency** via `asyncio.gather` / `asyncio.TaskGroup` for independent awaits;
+  don't `await` in a loop when the calls are independent.
+- **Tests**: `pytest-asyncio` is in `auto` mode — an `async def test_*` just works,
+  no `@pytest.mark.asyncio` needed.
+- **Don't fire-and-forget** without holding a reference (`asyncio.create_task` results
+  must be tracked, or you lose exceptions). The OME subsystem owns the long-running
+  background loops — application code shouldn't spawn its own.