docs: consolidate all docs under docs/ — single source of truth

Move issues (01–29) and PRD from .scratch/distributed-inference-network/
into docs/issues/ and docs/. Update ralph_progress.py DEFAULT_PRD path
and rewrite docs/agents/issue-tracker.md to reflect the new layout.

The distributed_inference_network.egg-info/docs/ mirror is a build
artifact already covered by *.egg-info/ in .gitignore — not committed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/issues/01-monorepo-scaffold.md

@@ -0,0 +1,29 @@
+Status: ready-for-agent
+
+# 01 — Monorepo scaffold + single-node smoke test
+
+## What to build
+
+Stand up the monorepo package layout and prove that a client HTTP request can travel end-to-end through the stack — gateway → one node serving all layers → valid response — before any real model or distributed logic is wired in.
+
+The six top-level packages should exist with minimal stubs:
+- `packages/node` — node client CLI (`meshnet-node`)
+- `packages/gateway` — HTTP gateway + route orchestration
+- `packages/tracker` — node registry and route selection
+- `packages/sdk` — `meshnet` Python SDK
+- `packages/contracts` — Solana smart contract wrappers
+- `packages/p2p` — gossip and shard swarm
+
+The smoke test uses a tiny in-process stub model (not a real LLM) so the test is fast and has no external dependencies. The node runs in the same process as the test. The gateway is a real HTTP server. The client sends a real `POST /v1/chat/completions` request and receives a valid OpenAI-format response.
+
+## Acceptance criteria
+
+- [ ] `pip install -e packages/node packages/gateway packages/tracker` works from repo root
+- [ ] `meshnet-node`, `meshnet-gateway`, and `meshnet-tracker` CLI entry points exist
+- [ ] A single integration test starts a gateway and one stub node in-process, sends a `POST /v1/chat/completions` request, and asserts a valid OpenAI-format response is returned
+- [ ] The test passes with `pytest` from repo root with no external services running
+- [ ] All six package directories exist with `pyproject.toml` and an importable top-level module
+
+## Blocked by
+
+None — can start immediately.