V2 python bazaar

[phdargen]

Description

• Adds discovery extension
• Removes null fields like "body_fields":null,"header_fields":null from output_schema for legacy fastapi/flask, closing FastAPI Input Schema not resolved by x402scan #862 and doesn't repeat the same mistake for v2
• removes legacy mainnet example
• removes unused code in e2e tests

Tests

🔍 Running Bazaar Discovery Validation...


╔════════════════════════════════════════════════════════╗
║         Bazaar Discovery Extension Validation          ║
╚════════════════════════════════════════════════════════╝

📋 Expected Discoverable Endpoints: 5

═══════════════════════════════════════════════════════
                 Discovery Summary
═══════════════════════════════════════════════════════
Total Facilitators:          1
Facilitators with Bazaar:    1
Expected Endpoints:          5
Total Discovered Resources:  5

📍 typescript:
   Discovered: 5/5
   ✅ All expected endpoints discovered

═══════════════════════════════════════════════════════
✅ Discovery Validation: PASSED
═══════════════════════════════════════════════════════


🧹 Cleaning up...
  🛑 Stopping facilitator: typescript

📊 Test Summary
==============
✅ Passed: 7
❌ Failed: 0
📈 Total: 7

📋 Detailed Test Results
========================

✅ PASSED TESTS:

  # 1: httpx → fastapi → /protected
      Facilitator: typescript | Network: eip155:84532 | Tx: 0x818d301e...
  # 2: httpx → fastapi → /protected-2
      Facilitator: typescript | Network: eip155:84532 | Tx: 0x5f526afb...
  # 3: httpx → fastapi → /protected-svm
      Facilitator: typescript | Network: solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1 | Tx: 4T3SvMp2ZB...
  # 4: requests → fastapi → /protected
      Facilitator: typescript | Network: eip155:84532 | Tx: 0xbb75e851...
  # 5: requests → fastapi → /protected-svm
      Facilitator: typescript | Network: solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1 | Tx: 5jtEnCku7S...
  # 6: httpx → flask → /protected
      Facilitator: typescript | Network: eip155:84532 | Tx: 0x5f71641c...
  # 7: httpx → flask → /protected-svm
      Facilitator: typescript | Network: solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1 | Tx: 2PBB8sfW5z...

📊 Breakdown by Facilitator:
   typescript      ✅ 7 / ❌ 0 (100%)

📊 Breakdown by Server:
   fastapi              ✅ 5 / ❌ 0 (100%)
   flask                ✅ 2 / ❌ 0 (100%)

📊 Breakdown by Client:
   httpx                ✅ 5 / ❌ 0 (100%)
   requests             ✅ 2 / ❌ 0 (100%)

📊 Protocol Family Breakdown:
   EVM: ✅ 4 / ❌ 0 / 📈 4 total
   SVM: ✅ 3 / ❌ 0 / 📈 3 total

Checklist

• I have formatted and linted my code
• All new and existing tests pass
• My commits are signed (required for merge) -- you may need to rebase if you initially pushed unsigned commits

[vercel]

@phdargen is attempting to deploy a commit to the Coinbase Team on Vercel.

A member of the Team first needs to authorize it.

[CarsonRoscoe]

Looking good!

[Ilevk]

it would be helpful to implement advanced server example.