feat!: replace per-SP YugabyteDB with stock Postgres + Scylla

.github/copilot-instructions.md

@@ -4,7 +4,7 @@
 
 **foc-devnet** is a Rust CLI tool for managing local Filecoin networks with FOC (Filecoin Onchain Contracts) support for warm storage services. It orchestrates Docker containers running Lotus nodes, miners, databases, and deploys smart contracts using Foundry (Forge/Cast).
 
-**Key Technologies**: Rust, Docker, Filecoin Lotus, FEVM (Filecoin EVM), Foundry, YugabyteDB, Solidity
+**Key Technologies**: Rust, Docker, Filecoin Lotus, FEVM (Filecoin EVM), Foundry, PostgreSQL, ScyllaDB, Solidity
 
 ## Architecture Patterns
 
@@ -36,7 +36,7 @@ Steps execute in this strict order (see `src/commands/start/mod.rs`):
 2. **Lotus** - Start Filecoin daemon with FEVM enabled
 3. **Lotus-Miner** - Start first-generation block producer
 4. **FOC Deploy** - Deploy MockUSDFC token and FOC warm storage contracts
-5. **Yugabyte** - Start database for Curio
+5. **Databases** - Start Postgres + Scylla for Curio
 6. **Curio** - Start second-generation miner (commented out, WIP)
 
 **Critical**: Each step depends on previous steps being healthy. DO NOT reorder.
@@ -47,7 +47,7 @@ Steps execute in this strict order (see `src/commands/start/mod.rs`):
 foc-lotus           # Lotus daemon (ports 1234 API, 1235 P2P)
 foc-lotus-miner     # First-gen miner (port 2345)
 foc-builder         # Foundry tools (--network host)
-foc-yugabyte        # Database for Curio (port 5433)
+postgres / scylla   # Databases for Curio (stock images, dynamic ports)
 foc-curio           # Second-gen miner (WIP)
 ```
 
@@ -71,7 +71,6 @@ All persistent data lives under `~/.foc-devnet/` (see `src/paths.rs`):
 │       ├── genesis/            # Genesis block config
 │       ├── genesis-sectors/    # Pre-sealed sectors
 │       ├── lotus-keys/         # BLS signing keys
-│       ├── yugabyte-data/      # Database data
 │       └── foc-contract-addresses.json  # Deployed contract addresses
 ├── logs/                       # Container logs
 ├── repos/

.github/workflows/ci_run.yml

@@ -143,8 +143,7 @@ jobs:
         echo "docker-hash=$DOCKER_HASH" >> $GITHUB_OUTPUT
         echo "DOCKER_HASH: $DOCKER_HASH"
 
-    # CACHE-DOCKER: Try to restore pre-built Docker images (foc-lotus, foc-lotus-miner, foc-builder, foc-curio, foc-yugabyte)
-    # These images contain YugabyteDB and all build dependencies
+    # CACHE-DOCKER: Try to restore pre-built Docker images (foc-lotus, foc-lotus-miner, foc-builder, foc-curio)
     - name: "CACHE_RESTORE: {C-docker-images-cache}"
       id: cache-docker-images
       uses: actions/cache/restore@v4
@@ -168,15 +167,14 @@ jobs:
         rm -rf ~/.docker-images-cache
         df -h
 
-    # If Docker images are cached, skip building them AND skip downloading YugabyteDB
-    # (YugabyteDB is already baked into the foc-yugabyte Docker image)
+    # If Docker images are cached, skip building them
     - name: "EXEC: {Initialize with cached Docker}, DEP: {C-docker-images-cache}"
       if: steps.cache-docker-images.outputs.cache-hit == 'true'
       run: |
         ./foc-devnet clean --all
         ./foc-devnet init --no-docker-build ${{ inputs.init_flags }}
 
-    # If Docker images are not cached, do full init (downloads YugabyteDB and builds all images)
+    # If Docker images are not cached, do full init (builds all images)
     - name: "EXEC: {Initialize without cache}, independent"
       if: steps.cache-docker-images.outputs.cache-hit != 'true'
       run: |
@@ -193,7 +191,6 @@ jobs:
         docker save foc-lotus-miner -o ~/.docker-images-cache/foc-lotus-miner.tar
         docker save foc-builder -o ~/.docker-images-cache/foc-builder.tar
         docker save foc-curio -o ~/.docker-images-cache/foc-curio.tar
-        docker save foc-yugabyte -o ~/.docker-images-cache/foc-yugabyte.tar
         echo "Docker images saved to cache"
         ls -lath ~/.docker-images-cache/
         df -h
@@ -403,7 +400,7 @@ jobs:
           echo "Warning: could not resolve numeric job ID (GITHUB_JOB=$GITHUB_JOB)"
         fi
 
-    # Setup scenario test prerequisites (Foundry, Python 3.11 via pyenv, cqlsh)
+    # Setup scenario test prerequisites (Foundry; CQL queries use the Scylla container's bundled cqlsh)
     - name: "EXEC: {Setup scenario prerequisites}, independent"
       if: steps.start_cluster.outcome == 'success'
       run: ./scripts/setup-scenarios-prerequisites.sh