feat(admin-api): add create table revision from path endpoint

[shiyasmohd]

Summary

• Add POST /revisions/create endpoint that registers a table revision from a custom object storage path.
• Add namespace prefix to PhyTablePath and PhyTableRevisionPath with backward-compatible legacy fallback for existing data stored without namespace
• Modify restore handler to check for an active revision in the metadata DB before falling back to object store scanning
• Add integration tests

Example

URL : POST http://localhost:1610/revisions/create
Body

{
    "dataset": "edgeandnode/mainnet@0.0.1",
    "table_name": "blocks",
    "path": "custom/path/to/files"
}