Make the component library a standalone product door (2.63.0).

Add /api/library datasheet import and component GET/PUT with no exam.
Reorganize pytest into datasheet, library, schematic, PCB, and AF+AI.
Document Rust criteria (none chosen; no rustup) and coding conformity.

tests/test_deepseek_only.py

@@ -1,54 +0,0 @@
-"""Periscope LLM routing is DeepSeek only.
-
-Favor: every pipeline stage uses DeepSeek even if PROVIDER_* is set to
-anthropic; model_for_stage stays on deepseek-flash.
-Against: anthropic fallback is ignored; get_provider_by_name('anthropic')
-does not construct the Anthropic SDK client.
-"""
-
-from __future__ import annotations
-
-import pytest
-
-from backend.config import settings
-from backend.services.llm.factory import get_provider, get_provider_by_name
-
-
-@pytest.fixture
-def restore_routing():
-    snap = {
-        "provider_default": settings.provider_default,
-        "provider_validation": settings.provider_validation,
-        "fallback_provider_validation": settings.fallback_provider_validation,
-        "fallback_model_validation": settings.fallback_model_validation,
-        "deepseek_api_key": settings.deepseek_api_key,
-    }
-    if not settings.deepseek_api_key:
-        settings.deepseek_api_key = "sk-test-not-called"
-    yield
-    for k, v in snap.items():
-        setattr(settings, k, v)
-    get_provider_by_name.cache_clear()
-
-
-def test_stage_stays_deepseek_when_env_says_anthropic(restore_routing):
-    settings.provider_validation = "anthropic"
-    assert settings.provider_for_stage("validation") == "deepseek"
-    get_provider_by_name.cache_clear()
-    assert get_provider("validation").name == "deepseek"
-    assert "deepseek" in settings.model_for_stage("validation")
-
-
-def test_anthropic_fallback_is_not_used(restore_routing):
-    settings.fallback_provider_validation = "anthropic"
-    settings.fallback_model_validation = "claude-sonnet-4-6"
-    assert settings.fallback_for_stage("validation") is None
-
-
-def test_get_provider_by_name_does_not_load_anthropic(restore_routing):
-    get_provider_by_name.cache_clear()
-    try:
-        p = get_provider_by_name("anthropic")
-        assert p.name == "deepseek"
-    finally:
-        get_provider_by_name.cache_clear()