docs(architecture): replace NATS JetStream with RabbitMQ for job dispatch

Switch the durable ingestion/maintenance job-dispatch broker decision from
NATS JetStream to RabbitMQ (aio-pika), rewriting ADR-0014 and propagating
the terminology change through ADR-0015, ADR-0016, and the ingestion
vertical-slice plan. Adds aio-pika as a runtime dependency.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

pyproject.toml

@@ -5,14 +5,41 @@ description = "Add your description here"
 readme = "README.md"
 requires-python = ">=3.13"
 dependencies = [
+    "aio-pika>=9.5.0",
+    "alembic>=1.19.1",
     "fastapi[standard]==0.141.1",
-    "pydantic-settings>=2.14.2",
+    "langgraph>=1.2.10",
+    "pydantic-settings>=2.15.0",
+    "sqlalchemy>=2.0.51",
 ]
 
 [dependency-groups]
 dev = [
-    "ruff>=0.16.1",
-    "ty>=0.0.65",
+    "asgi-lifespan>=2.1.0",
+    "httpx>=0.28.1",
+    "pytest>=8.3.5",
+    "pytest-asyncio>=0.25.3",
+    "pytest-cov>=6.0.0",
+    "pytest-timeout>=2.3.1",
+    "ruff>=0.16.2",
+    "testcontainers>=4.9.2",
+    "ty>=0.0.69",
+]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+asyncio_mode = "strict"
+timeout = 10
+markers = [
+    "unit: fast tests with no external services",
+    "integration: tests against a real disposable service",
+    "e2e: end-to-end vertical-slice tests",
+    "postgres: integration test using Postgres",
+    "minio: integration test using MinIO",
+    "rabbitmq: integration test using RabbitMQ",
+    "qdrant: integration test using Qdrant",
+    "slow: test exceeds normal integration feedback time",
+    "live_provider: opt-in test that calls an external provider",
 ]
 
 [tool.ruff]
@@ -45,3 +72,17 @@ indent-style = "space"
 
 [tool.ty.environment]
 python-version = "3.13"
+
+[tool.ty.rules]
+# High-value, currently ignore/warn by
+possibly-unresolved-reference = "error"
+missing-type-argument = "warn"
+possibly-missing-attribute = "warn"
+
+# Nice-to-have discipline:
+unused-ignore-comment = "warn"
+missing-override-decorator = "warn"
+
+# Turn OFF or downgrade if noisy on your codebase:
+possibly-missing-import = "ignore"
+division-by-zero = "ignore"