Restructure economics doc into 27 org-roam interlinked nodes

Replace monolithic passepartout-economics.org with directory of
org-roam style nodes, each with :ID: property and cross-references
using [[id:uuid][title]] format.

27 nodes organized by theme:
- Core: index, triad overview, agora, stoa
- Revenue: verification appliance, domain gate packages, evaluation
  harness, skill marketplace, agora usernames, PDS service, compute marketplace
- Strategy: investment thesis, moats, licensing, patents, AI industry impact
- Analysis: lisp economics, sufficiency flip, time estimates, cost structure,
  gate rule encoding, upgrade lifecycle, biology parallels, symbolics comparison
- Big money: verification monopoly, infrastructure lock-in

Old file kept as archive with redirect links to new structure.

ideas/passepartout-economics/upgrade-lifecycle.org

@@ -0,0 +1,22 @@
+:PROPERTIES:
+:ID:       29e4dbf3-cf19-589c-8b14-389e8a39d564
+:END:
+#+title: Upgrade and Distribution Lifecycle
+#+filetags: :passepartout:economics:upgrade:distribution:ontology:
+
+Once instances diverge in both code and knowledge, naive git pull breaks things. Passepartout's architecture already has the primitives for safe upgrades:
+
+- **Ontology versioning:** every fact stores the ontology version at assertion. On upgrade, facts with old versions are flagged for re-verification.
+- **Degradation, not crash:** if an upgrade breaks the fact store, the system degrades to the pre-macro state (hash-table fallback, text-scan fallback). Still works — just proves less.
+- **Reversible upgrades (Phase 0 undo):** every upgrade produces a Merkle snapshot before applying.
+- **Delta distribution:** upgrades delivered as diffs against the current ontology version. Migration script runs automatically.
+
+**The upgrade is verified by the upgraded system before committing.** The distributor ships the new gate vector; ACL2 reports which rules are compatible and which need review. The operator reviews only the incompatible subset.
+
+**Business model for upgrades:**
+- Code upgrades: free (AGPL)
+- Migration scripts: subscription. The verified migration path from current ontology version to new one.
+- Domain knowledge package upgrades: subscription. When HIPAA updates, the healthcare package updates.
+- Verification appliance firmware: bundled with hardware. Signed and verified against hardware root of trust.
+
+See also: [[id:2f783eb4-638e-5afa-9b59-6224d086a712][Infrastructure lock-in]], [[id:84a537b4-4256-50c8-91f5-dd5b4538418f][Verification appliance]], [[id:c34940cc-090e-57c4-8020-e78b1d32b96c][Domain gate packages]]