docs: Clarify formula vs molecule semantics - formulas are NOT instructions

PROBLEM: Agents were reading formula files directly and manually creating beads
for each step, rather than using the cook→pour→molecule pipeline.

FIXES:
- polecat-CLAUDE.md: Changed "following the formula" to "work through your
  pinned molecule" and added explicit anti-pattern warning
- mol-polecat-work.formula.toml: Added note that formula defines template,
  use bd ready to find step beads
- docs/molecules.md: Added "Common Mistake" section with WRONG/RIGHT examples
- mol-*.formula.toml (5 files): Changed "execute this formula" to "work
  through molecules (poured from this formula)"

The key insight: Formulas are source templates (like source code). You never
read them directly. The cook → pour pipeline creates step beads for you.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.beads/formulas/mol-convoy-cleanup.formula.toml

@@ -1,7 +1,7 @@
 description = """
 Archive completed convoys and notify overseer.
 
-Dogs execute this formula when convoys complete. The Deacon detects completed
+Dogs work through molecules (poured from this formula) when convoys complete. The Deacon detects completed
 convoys (all tracked issues closed) and slings this work to a dog for:
 - Generating convoy summary
 - Archiving convoy state

.beads/formulas/mol-dep-propagate.formula.toml

@@ -1,7 +1,7 @@
 description = """
 Propagate cross-rig dependency resolution.
 
-Dogs execute this formula when dependencies resolve across rig boundaries.
+Dogs work through molecules (poured from this formula) when dependencies resolve across rig boundaries.
 When an issue in one rig closes, dependent issues in other rigs may unblock.
 This formula handles:
 - Finding cross-rig dependents

.beads/formulas/mol-digest-generate.formula.toml

@@ -1,7 +1,7 @@
 description = """
 Generate daily digest for overseer (Mayor).
 
-Dogs execute this formula on a scheduled basis (daily, or triggered by plugin)
+Dogs work through molecules (poured from this formula) on a scheduled basis (daily, or triggered by plugin)
 to create summary digests of Gas Town activity. This aggregates:
 - Work completed across all rigs
 - Issues filed and closed

.beads/formulas/mol-orphan-scan.formula.toml

@@ -1,7 +1,7 @@
 description = """
 Find and reassign orphaned work.
 
-Dogs execute this formula to scan for orphaned state across the town:
+Dogs work through molecules (poured from this formula) to scan for orphaned state:
 - Issues marked in_progress with no active polecat
 - Molecules attached but worker gone
 - Merge queue entries with dead owners

.beads/formulas/mol-polecat-work.formula.toml

@@ -9,10 +9,13 @@ crash after any step and resume from the last completed step.
 
 You are an ephemeral worker. You:
 1. Receive work via your hook (pinned molecule + issue)
-2. Execute the work following this formula
+2. Work through molecule steps using `bd ready` / `bd close <step>`
 3. Submit to merge queue via `gt done`
 4. Become recyclable - Refinery handles the rest
 
+**Important:** This formula defines the template. Your molecule already has step
+beads created from it. Use `bd ready` to find them - do NOT read this file directly.
+
 **You do NOT:**
 - Push directly to main (Refinery merges)
 - Close your own issue (Refinery closes after merge)

.beads/formulas/mol-session-gc.formula.toml

@@ -1,7 +1,7 @@
 description = """
 Clean stale sessions and garbage collect.
 
-Dogs execute this formula to clean up dead sessions, orphaned processes, and
+Dogs work through molecules (poured from this formula) to clean up dead sessions, orphaned processes, and
 other system cruft. This is the garbage collector for Gas Town's runtime:
 - Dead tmux sessions (no Claude process)
 - Orphaned Claude processes (no tmux parent)