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/imports.md

@@ -0,0 +1,22 @@
+---
+paths:
+  - "src/**/*.py"
+  - "tests/**/*.py"
+---
+
+# Imports rule
+
+- **`from __future__ import annotations`** is the first import in every module.
+- **Import order** (ruff `I` enforces, `make format` fixes): stdlib → third-party
+  → first-party (`everalgo`, then `everos`). One group per blank-line-separated block.
+- **Absolute imports** for cross-package references (`from everos.memory import ...`).
+  Relative imports (`from .models import ...`) only **within** a package, typically
+  in its `__init__.py`.
+- **`TYPE_CHECKING` guard** for import cycles and type-only imports:
+  ```python
+  from typing import TYPE_CHECKING
+  if TYPE_CHECKING:
+      from everos.config import Settings
+  ```
+- Never import a private internal across a package boundary — respect the
+  `import-linter` contracts (see [architecture.md](architecture.md)).