Input validation using Pydantic schema

• | Analyze existing API payloads/endpoints | Bible Glyph | 3 |
• | Create shared Pydantic schemas | Bible Glyph | 5 |
• | Integrate validation into endpoints | Bible Glyph | 3 |
• | Standardize validation error responses | Bible Glyph | 2 |
• | Testing invalid payloads | Bible Glyph | 2 |
• | Modifications | Bible Glyph | 1 |
• | Validation | Bible Glyph | 0.5 | @Jayasankar