Add P2P trading examples, implementation guides, and enrollment specs

- P2P Trading implementation guide (revised) with notes on allocation/settlement and payment
- Onboarding implementation guide for digital energy programs
- Example JSONs for P2P trading flows (discover, select, init, confirm, status)
- Example JSONs for P2P trading interdiscom flows (including cascaded, curtailment, settlement)
- Example JSONs for enrollment flows (OAuth2, OTP, prosumer/consumer variants)
- EV charging examples reorganized under examples/ev-charging/
- Energy credential VC examples (consumption, generation, storage profiles)
- Updated schema validation and Postman collection generation scripts
- Removed old examples/v2/P2P_Trading/ (superseded by new structure)
- Removed taxonomy.md (content integrated into implementation guide)

Part of PR #160 decomposition — Examples & Implementation Guides

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ameetdesh

docs/Onboarding_Users_in_Digital_Energy_Programs.md

@@ -303,7 +303,7 @@ Specifically, for EV Charging, please use the following configuration:
 
 ### 11.2.3. 10.2.3 Performing a test EV charging transaction
 
-Step 1 : Download the postman collection, from [here](/testnet/postman-collections/v2/EV_Charging/).
+Step 1 : Download the postman collection, from [here](/testnet/ev-charging-devkit/postman/).
 
 Step 2 : Run API calls
 

docs/implementation-guides/v2/EV_Charging/EV_Charging.md

@@ -0,0 +1,53 @@
+# Enrollment Examples
+
+This directory contains JSON examples for the enrollment/onboarding flow for Digital Energy Programs.
+
+## Files
+
+### Init Requests
+- **init-request-simple-consumer.json** - Simple consumer with single meter enrolling in a demand flexibility program
+- **init-request-prosumer-solar-battery.json** - Prosumer with solar and battery DERs enrolling in a P2P trading program
+
+### On_Init Responses
+- **on-init-response-success.json** - Successful credential verification with no conflicts
+- **on-init-response-conflict.json** - Enrollment conflict detected (meter already enrolled)
+- **on-init-response-error.json** - Credential verification failed
+
+### Confirm Request
+- **confirm-request.json** - Confirm request with enrollment start and end dates
+
+### On_Confirm Response
+- **on-confirm-response-success.json** - Successful enrollment with issued credential
+
+### Update Requests (Revocation/Unenrollment)
+- **update-request-consent-revocation.json** - Request to revoke a consent credential
+- **update-request-unenrollment.json** - Request to unenroll from a program
+
+### On_Update Responses
+- **on-update-response-consent-revocation.json** - Confirmation of consent revocation with status list details
+- **on-update-response-unenrollment.json** - Confirmation of unenrollment with all credential revocations
+
+## Usage
+
+These examples are embedded in the implementation guide using the `embed_example_json.py` script. The examples are referenced using `<details>` blocks in the markdown file.
+
+To update the embedded examples in the guide, run:
+```bash
+python3 scripts/embed_example_json.py docs/implementation-guides/v2/Onboarding/IG_Onboarding_users_in_digital_energy_programs.md
+```
+
+## Schema
+
+All examples use the `EnergyEnrollment` schema defined at:
+- Context: `https://raw.githubusercontent.com/beckn/protocol-specifications-new/refs/heads/p2p-trading/schema/EnergyEnrollment/v0.2/context.jsonld`
+- Attributes: `../protocol-specifications-new/schema/EnergyEnrollment/v0.2/attributes.yaml`
+
+## Revocation Mechanism
+
+Consent and enrollment credentials use W3C VC Status Lists (BitstringStatusList) for revocation:
+
+1. **Consent Revocation**: User revokes consent via `update` action → BPP updates status list → Future verifications fail
+2. **Unenrollment**: User unenrolls via `update` action → BPP revokes enrollment VC and all consent VCs → All credentials added to status lists
+
+Verifiers must check status lists before accepting credentials. Status lists use bitstrings for efficient and privacy-preserving revocation checks as per [W3C VC Data Model v2.0](https://www.w3.org/TR/vc-data-model-2.0/).
+

docs/implementation-guides/v2/Onboarding/IG_Onboarding_users_in_digital_energy_programs.md

@@ -0,0 +1,58 @@
+{
+  "context": {
+    "version": "2.0.0",
+    "action": "confirm",
+    "domain": "beckn.one:deg:p2p-enrollment:2.0.0",
+    "timestamp": "2024-10-15T10:35:00Z",
+    "message_id": "msg-confirm-oauth2-001",
+    "transaction_id": "txn-onboard-oauth2-001",
+    "bap_id": "utility-portal.example.com",
+    "bap_uri": "https://utility-portal.example.com/beckn",
+    "bpp_id": "vpp-program-owner.example.com",
+    "bpp_uri": "https://vpp-program-owner.example.com/beckn",
+    "ttl": "PT30S"
+  },
+  "message": {
+    "order": {
+      "@context": "https://raw.githubusercontent.com/beckn/protocol-specifications-new/refs/heads/p2p-trading/schema/core/v2/context.jsonld",
+      "@type": "beckn:Order",
+      "beckn:id": "order-onboard-oauth2-001",
+      "beckn:orderStatus": "PENDING",
+      "beckn:seller": "vpp-program-flex-001",
+      "beckn:buyer": {
+        "@context": "https://raw.githubusercontent.com/beckn/protocol-specifications-new/refs/heads/p2p-trading/schema/core/v2/context.jsonld",
+        "@type": "beckn:Buyer",
+        "beckn:id": "user-12345"
+      },
+      "beckn:orderItems": [
+        {
+          "beckn:orderedItem": "program-p2p-trading-001"
+        }
+      ],
+      "beckn:fulfillment": {
+        "@context": "https://raw.githubusercontent.com/beckn/protocol-specifications-new/refs/heads/p2p-trading/schema/core/v2/context.jsonld",
+        "@type": "beckn:Fulfillment",
+        "beckn:id": "fulfillment-onboard-001",
+        "beckn:mode": "DIGITAL",
+        "beckn:fulfillmentStatus": "PENDING"
+      },
+      "beckn:orderAttributes": {
+        "@context": "https://raw.githubusercontent.com/beckn/protocol-specifications-new/refs/heads/p2p-trading/schema/EnergyEnrollment/v0.2/context.jsonld",
+        "@type": "EnergyEnrollment",
+        "userAuth": {
+          "authMethod": "OIDC",
+          "accessToken": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyLTEyMzQ1IiwiYXVkIjoicHJvZ3JhbS1vd25lci1icHAiLCJpc3MiOiJodHRwczovL3V0aWxpdHktaWRwLmV4YW1wbGUuY29tIiwiaWF0IjoxNzI5MDAwMDAwLCJleHAiOjE3MjkwMDM2MDB9.signature"
+        },
+        "meters": [
+          {
+            "meterId": "umid-001",
+            "meterNumber": "MTR-987654321",
+            "connectionType": "residential"
+          }
+        ],
+        "startDate": "2024-11-01T00:00:00Z",
+        "endDate": "2025-10-31T23:59:59Z"
+      }
+    }
+  }
+}