feat(deacon): add dispatch-gated-molecules patrol step (GH#bd-1ep6e)

Add new step to mol-deacon-patrol.formula.toml that discovers molecules
blocked on gates that have now closed, and dispatches them to the
appropriate rig's polecat pool.

This completes the async resume cycle without explicit waiter tracking.
The molecule state IS the waiter - patrol discovers reality each cycle.

- Uses bd mol ready --gated to find gate-ready molecules
- Dispatches via gt sling <mol-id> <rig>/polecats
- Runs after gate-evaluation, before health-scan
- Bumps formula version to 6

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/formula/formulas/mol-deacon-patrol.formula.toml

@@ -23,7 +23,7 @@ Witnesses detect it and escalate to the Mayor.
 The Deacon's agent bead last_activity timestamp is updated during each patrol
 cycle. Witnesses check this timestamp to verify health."""
 formula = "mol-deacon-patrol"
-version = 5
+version = 6
 
 [[steps]]
 id = "inbox-check"
@@ -148,6 +148,49 @@ bd gate list --json
 After closing a gate, the Waiters field contains mail addresses to notify.
 Send a brief notification to each waiter that the gate has cleared."""
 
+[[steps]]
+id = "dispatch-gated-molecules"
+title = "Dispatch molecules with resolved gates"
+needs = ["gate-evaluation"]
+description = """
+Find molecules blocked on gates that have now closed and dispatch them.
+
+This completes the async resume cycle without explicit waiter tracking.
+The molecule state IS the waiter - patrol discovers reality each cycle.
+
+**Step 1: Find gate-ready molecules**
+```bash
+bd mol ready --gated --json
+```
+
+This returns molecules where:
+- Status is in_progress
+- Current step has a gate dependency
+- The gate bead is now closed
+- No polecat currently has it hooked
+
+**Step 2: For each ready molecule, dispatch to the appropriate rig**
+```bash
+# Determine target rig from molecule metadata
+bd mol show <mol-id> --json
+# Look for rig field or infer from prefix
+
+# Dispatch to that rig's polecat pool
+gt sling <mol-id> <rig>/polecats
+```
+
+**Step 3: Log dispatch**
+Note which molecules were dispatched for observability:
+```bash
+# Molecule <mol-id> dispatched to <rig>/polecats (gate <gate-id> cleared)
+```
+
+**If no gate-ready molecules:**
+Skip - nothing to dispatch. Gates haven't closed yet or molecules
+already have active polecats working on them.
+
+**Exit criteria:** All gate-ready molecules dispatched to polecats."""
+
 [[steps]]
 id = "check-convoy-completion"
 title = "Check convoy completion"
@@ -258,7 +301,7 @@ Keep notifications brief and actionable. The recipient can run bd show for detai
 [[steps]]
 id = "health-scan"
 title = "Check Witness and Refinery health"
-needs = ["trigger-pending-spawns", "gate-evaluation", "fire-notifications"]
+needs = ["trigger-pending-spawns", "dispatch-gated-molecules", "fire-notifications"]
 description = """
 Check Witness and Refinery health for each rig.