Add apis for p2p data management

[j-rafique]

No description provided.

[roomote]

Rooviewer Summary

PR: Add apis for p2p data management
Branch: action-recovery -> master
Status: Approved with minor suggestions

Overview

This PR adds recovery/admin API endpoints for P2P cascade data management. The changes introduce:

1. Recovery reseed logic (supernode/cascade/reseed.go) - Decodes an existing action, re-encodes the reconstructed file, regenerates RQ artefacts, and stores them via the register flow.
2. Recovery admin HTTP endpoints (supernode/transport/gateway/recovery_admin.go) - Token-gated REST endpoints for health checks, reseeding actions, and checking action status/distribution across supernodes.
3. Build/CI integration - Injects RECOVERY_ADMIN_TOKEN via ldflags at build time.
4. Dependency cleanup - Removes unused dependencies from sn-manager/go.mod.

What Looks Good

• Clean separation between cascade reseed logic and HTTP handler layer
• Proper semaphore-based concurrency control (1 concurrent reseed, 1 concurrent status probe)
• Good error handling with partial results returned even on failure
• Token-based auth gating with proper header validation
• Write deadline extension for long-running operations
• Self-probe optimization avoiding HTTP roundtrip for local node
• Comprehensive status endpoint with distribution visibility across all supernodes
• ListSupernodes added to the LumeraClient interface cleanly
• Test stubs updated to implement the new interface method

Issues Found

#	Severity	File	Description
1	nit	swagger.json:460	Tab vs space indentation inconsistency in recovery endpoint blocks
2	low	swagger.json:555-561	Reseed and status response schemas are untyped (additionalProperties: true) unlike the health response

No blocking issues found. Both comments are minor documentation/style suggestions.

[roomote]

Review from Rooviewer - minor suggestions, overall looks solid.

[roomote]

Approving - the recovery admin API implementation is well-structured with proper auth gating, concurrency control, and error handling. Only minor swagger documentation suggestions noted inline.