Add CONTD contract evaluator, deadline-aware buy pricing, actpkg JSON generator

- puga/contd.py, tools/contd.py: price open CONTD contract offers against real
  buy-fresh cost, flagging conditions that can't be priced from the API alone.
- tools/buyat.py: cheapest bid price likely to fill by a hard deadline
  (stockout risk), using the empirical first-passage model from history.py.
- puga/actpkg.py, tools/actpkg.py: Refined PrUn XIT ACT buy-list JSON packages.

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

puga/contd.py

@@ -0,0 +1,69 @@
+"""Player-to-player CONTD contracts (FIO /contract/allcontracts/{user}) - the NPC logistics-officer
+offers shown in APEX's CONTD panel, not the public Local Market hauling ads in puga/contracts.py.
+Only OPEN contracts are real choices - exactly one of the pool of (usually 3) offers can be accepted;
+CANCELLED/REJECTED/FULFILLED/PARTIALLY_FULFILLED are history or already-committed work.
+
+Condition vocabulary seen in this account's full history (2026-10-16): PAYMENT, REPUTATION,
+PROVISION_SHIPMENT and COMEX_PURCHASE_PICKUP (a material+qty+address you must supply - these are the
+only ones with a real market buy-fresh cost), PICKUP_SHIPMENT/DELIVERY_SHIPMENT (logistics legs, no
+separate cost beyond the material), and open-ended ones this module deliberately does NOT price
+because their real cost depends on context this API can't see (a ship already flying that route, a
+planet you were about to survey anyway, a ship already damaged): EXPLORATION (Address = planet to
+survey), REPAIR_SHIP, HEADQUARTERS_UPGRADE, BASE_CONSTRUCTION, CONTRIBUTION, WAIT,
+INCREASE_SATISFACTION. Judging whether one of those is actually cheap right now is the caller's job.
+"""
+from . import fio, market
+
+MATERIAL_TYPES = {"PROVISION_SHIPMENT", "COMEX_PURCHASE_PICKUP"}
+
+
+def open_contracts():
+    me = fio.me()
+    data = fio.own(f"/contract/allcontracts/{me}", ttl=60)
+    return [c for c in data if c["Status"] == "OPEN"]
+
+
+def evaluate(contract: dict, cx: str) -> dict:
+    """Payment, priced material requirements (buy-fresh cost at `cx` - assumes none already in free
+    stock, check storage for materials you may already hold), and any unpriced/contextual conditions
+    flagged separately for the caller to judge."""
+    payment = 0.0
+    reputation = False
+    requirements = []  # (ticker, qty, address)
+    flags = []         # (type, address) for conditions this module won't price
+    deadline_days = 0.0
+    for cond in contract["Conditions"]:
+        t = cond["Type"]
+        if t == "PAYMENT" and cond.get("Amount"):
+            payment += cond["Amount"]
+        elif t == "REPUTATION":
+            reputation = True
+        elif t in MATERIAL_TYPES and cond.get("MaterialTicker"):
+            requirements.append((cond["MaterialTicker"], cond["MaterialAmount"], cond.get("Address")))
+        elif t not in MATERIAL_TYPES | {"PAYMENT", "REPUTATION", "PICKUP_SHIPMENT", "DELIVERY_SHIPMENT"}:
+            flags.append((t, cond.get("Address")))
+        dl = cond.get("DeadlineDurationMs")
+        if dl:
+            deadline_days = max(deadline_days, dl / 86400000)
+
+    material_cost = 0.0
+    short = False
+    priced = []
+    for tick, qty, addr in requirements:
+        r = market.walk(tick, cx, qty, "buy")
+        priced.append({"ticker": tick, "qty": qty, "address": addr, "cost": r["total"], "short": r["short"]})
+        material_cost += r["total"]
+        short = short or r["short"]
+
+    return {
+        "id": contract["ContractLocalId"],
+        "partner": contract.get("PartnerName"),
+        "payment": payment,
+        "reputation": reputation,
+        "deadline_days": deadline_days,
+        "requirements": priced,
+        "material_cost": material_cost,
+        "net": payment - material_cost,
+        "short": short,
+        "flags": flags,
+    }