Initial commit: ag-bids MCP server

Exposes live + historical ag-bids commodity data (from the ag-monitor
service at agbids.paul.farm) as MCP tools, sitting behind MetaMCP at
https://mcp.jpaul.io/metamcp/ag-bids/mcp.

Pattern mirrors zerto-docs-rag with one addition: HTTP Basic auth in
front of the streamable-HTTP transport so namespace guessers can't reach
the tools. Stdio transport is unaffected (used by local Claude Desktop
dev).

Tools (markdown returns, ~15 LOC each):
  best_local_bid(commodity)       — where to sell corn/soy/wheat today,
                                    for the current calendar month only
  current_lime_price()            — latest lime quotes ($/ton)
  current_input_price(product?)   — MAP / Potash / Lime
  latest_prices(...)              — filtered snapshot
  price_history(...)              — per-(source,delivery) trend
  list_sources / list_commodities / list_deliveries
  source_health()                 — healthy / stale / down buckets
  todays_summary()                — same shape as morning brief snapshot

Data path: ag-bids-mcp -> X-API-Key -> /api/data/* on ag-monitor
(reuses BRIEF_API_KEY).

Tests: 24 covering the httpx client, markdown formatters, HTTP Basic
middleware (401/200), and JSONL usage logging.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,29 @@
+FROM python:3.12-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+      curl ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY ag_bids_mcp ./ag_bids_mcp
+
+RUN mkdir -p /app/var/logs
+
+# Streamable-HTTP transport in container; switch to stdio via env for dev.
+ENV MCP_TRANSPORT=streamable-http \
+    MCP_HOST=0.0.0.0 \
+    MCP_PORT=8000 \
+    USAGE_LOG_DIR=/app/var/logs \
+    USAGE_LOG_KEEP_DAYS=90
+
+EXPOSE 8000
+
+CMD ["python", "-m", "ag_bids_mcp.server"]