feat: ollama-proxy — multi-account Ollama Cloud reverse proxy

Go reverse proxy for ollama.com that balances requests across multiple
API keys with round-robin and failover on 429/5xx. Exposes both native
Ollama API (/api/*) and OpenAI-compatible (/v1/*) passthrough.

- Round-robin balancer with per-account cooldown (60s default)
- Pre-stream failover: 429 → cooldown + next account; 5xx → next account
- Streaming invariant: once 2xx starts streaming, no account switch
- SSE (text/event-stream) and NDJSON passthrough with http.Flusher
- CLI: accounts add/list/remove/set-base-url, serve, version
- Accounts stored in ~/.config/ollama-proxy/accounts.json (chmod 0600)
- systemd unit (User=dueattendant149, 127.0.0.1:11435, Restart=always)
- 43 tests (unit + integration with httptest upstream)
- opencode integration: custom provider 'ocp' with explicit model list
- Requires NO_PROXY=127.0.0.1,localhost when HTTP_PROXY is set

Makefile

@@ -0,0 +1,28 @@
+GO=go
+
+.PHONY: build install uninstall vet fmt test clean
+
+build:
+	$(GO) build -o ollama-proxy .
+
+install: build
+	install -m 755 ollama-proxy /usr/local/bin/ollama-proxy
+	install -m 644 systemd/ollama-proxy.service /etc/systemd/system/ollama-proxy.service
+	systemctl daemon-reload
+
+uninstall:
+	-systemctl disable --now ollama-proxy
+	rm -f /usr/local/bin/ollama-proxy /etc/systemd/system/ollama-proxy.service
+	systemctl daemon-reload
+
+vet:
+	$(GO) vet ./...
+
+fmt:
+	$(GO)fmt -l .
+
+test:
+	$(GO) test ./...
+
+clean:
+	rm -f ollama-proxy