Promote entire passepartout-economics/ to ideas/ root

All 31 files from ideas/passepartout-economics/ promoted to ideas/ root.
- Subfolder's passepartout-economics.org (42-line index) renamed to
  triad-index.org to avoid collision with root-level full doc
- index.org removed (redundant — triad-index.org replaces it)
- Root-level passepartout-economics.org: stripped file:passepartout-economics/
  prefix from all cross-references (now simple file:foo.org links)
- compliance-framework-mapping.org: same prefix cleanup
- All internal file: links within the economics docs already used simple
  names (no prefix) — they resolve correctly from ideas/ root

ideas/agora.org

@@ -0,0 +1,22 @@
+:PROPERTIES:
+:ID:       1d074690-a279-59cb-b91d-e9a22ae104ad
+:END:
+#+title: Agora — The Society (Decentralized Network)
+#+filetags: :passepartout:agora:network:dids:
+
+Agora is the decentralized identity and communication layer that connects Passepartout instances:
+
+- **Self-sovereign identity** via HD key derivation (BIP-44)
+- **Encrypted messaging** via DIDComm (agent-to-agent and agent-to-human)
+- **Notes** as atomic, content-addressed, signed data units (mapped from Passepartout memory-objects)
+- **Relay Network** for censorship-resistant message routing
+- **Personal Data Store (PDS)** — the Merkle fact store exposed as a network-addressable service
+- **Compute marketplace** where instances offer symbolic engine capacity
+- **Contracts and liquid democracy** infrastructure
+
+The PDS is Passepartout's in-process memory — the Merkle tree, the fact store, the memory-objects. Every memory-object already has a SHA-256 hash, which maps directly to Agora's CIDv1 content addressing.
+
+Revenue paths from Agora:
+- [[file:agora-usernames.org][Premium username registry]] — $10M/yr at scale
+- [[file:pds-as-a-service.org][PDS as a service]] — $18M/yr at scale
+- [[file:compute-marketplace.org][Compute marketplace]] — venture-scale