Feature/john deer tap adapter

[PrudhviChanda]

Description

This PR introduces the John Deere TAP Adapter, enabling automated machinery and organization discovery from the John Deere Operations Center.

Key Features

• OAuth2 Token Rotation: Implements automated refresh_token handling to manage short-lived access tokens.
• Flexible Discovery: Probes both /equipment and /machines endpoints for cross-version compatibility.
• Standardization: Transforms raw OEM JSON into standardized SIRUP and BITE formats.
• DCO Compliant: All commits are signed-off.

Testing & Verification

I have included a comprehensive John_deer_TESTING.md file that allows reviewers to verify the adapter.

• Unit Tests: Pass with 100% coverage on transformation logic (python3 -m unittest implementation.tests.test_johndeere_adapter).
• Integration Test: I have provided a self-contained shell-block in TESTING.md that generates a temporary test_sync.py utility. This allows verification without modifying the core project's orchestration logic.

Verified Output:

✓ Registered TAP adapter: johndeere
🔎 Found 1 farmers in registry.
📡 Starting sync for PRUDHVI_FARMS_001...
🚀 SUCCESS: Data stored at pancake_data_lake/TEST_FARMS_001_test.json

### Sample Verified BITE Output
<details>
<summary>Click to view the generated JSON for Verification Tractor (8R 370)</summary>

```json
{
    "Header": {
        "id": "b9e198a4-33bd-480f-b667-9d0c92cdef3d",
        "geoid": "Test_FIELD_001",
        "timestamp": "2026-02-04T05:52:48.186183Z",
        "type": "oem_data",
        "source": {
            "pipeline": "TAP",
            "vendor": "johndeere",
            "sirup_type": "oem_data",
            "auto_generated": true
        }
    },
    "Body": {
        "sirup_data": {
            "organizations": [
                {
                    "name": "POC",
                    "type": "customer",
                    "id": "7086742"
                }
            ],
            "assets": [
                {
                    "asset_id": "sandbox-demo-01",
                    "category": "MACHINERY",
                    "brand": "John Deere",
                    "model": "8R 370",
                    "serial_number": "RW8370VIRTUAL",
                    "display_name": "Verification Tractor"
                }
            ]
        }
    },
    "Footer": {
        "hash": "dec6ae428f579c6f5ad1b5c461b69bc850b25bb9d2d3286cf383b38fba1072db",
        "tags": ["automated", "tap", "oem_data", "johndeere", "machinery"]
    }
}

[PrudhviChanda]

Hi @sumerjohal , @pranavnbapat , just pinging this PR. No rush at all, but I'd love to get some feedback when you have the bandwidth. Let me know if there are any architectural adjustments I need to make to get this ready for merging