refactor: content-addressed assets, cross-channel multimodal, infra simplification (#63)

* refactor(attachment): multimodal attachment refactor with snapshot schema and storage layer

- Add snapshot schema migration (0008) and update init/versions/snapshots
- Add internal/attachment and internal/channel normalize for unified attachment handling
- Move containerfs provider from internal/media to internal/storage
- Update agent types, channel adapters (Telegram/Feishu), inbound and handlers
- Add containerd snapshot lineage and local_channel tests
- Regenerate sqlc, swagger and SDK

* refactor(media): content-addressed asset system with unified naming

- Replace asset_id foreign key with content_hash as sole identifier
  for bot_history_message_assets (pure soft-link model)
- Remove mime, size_bytes, storage_key from DB; derive at read time
  via media.Resolve from actual storage
- Merge migrations 0008/0009 into single 0008; keep 0001 as canonical schema
- Add Docker initdb script for deterministic migration execution order
- Fix cross-channel real-time image display (Telegram → WebUI SSE)
- Fix message disappearing on refresh (null assets fallback)
- Fix file icon instead of image preview (mime derivation from storage)
- Unify AssetID → ContentHash naming across Go, Agent, and Frontend
- Change storage key prefix from 4-char to 2-char for directory sharding
- Add server-entrypoint.sh for Docker deployment migration handling

* refactor(infra): embedded migrations, Docker simplification, and config consolidation

- Embed SQL migrations into Go binary, removing shell-based migration scripts
- Consolidate config files into conf/ directory (app.example.toml, app.docker.toml, app.dev.toml)
- Simplify Docker setup: remove initdb.d scripts, streamline nginx config and entrypoint
- Remove legacy CLI, feishu-echo commands, and obsolete incremental migration files
- Update install script and docs to require sudo for one-click install
- Add mise tasks for dev environment orchestration

* chore: recover migrations

---------

Co-authored-by: Acbox <acbox0328@gmail.com>

scripts/db-up.sh

@@ -1,63 +1,6 @@
 #!/bin/bash
-
 set -e
 
 PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
-CONFIG_FILE="${PROJECT_ROOT}/config.toml"
-MIGRATIONS_DIR="${PROJECT_ROOT}/db/migrations"
-
-GREEN='\033[0;32m'
-RED='\033[0;31m'
-NC='\033[0m'
-
-if [ ! -f "$CONFIG_FILE" ]; then
-    echo -e "${RED}Error: Config file not found${NC}"
-    exit 1
-fi
-
-if [ ! -d "$MIGRATIONS_DIR" ]; then
-    echo -e "${RED}Error: Migrations directory not found${NC}"
-    exit 1
-fi
-
-parse_toml_value() {
-    local key=$1
-    local section=$2
-    grep -A 20 "^\[$section\]" "$CONFIG_FILE" | grep "^$key" | head -1 | sed 's/.*=[ ]*//' | tr -d '"' | tr -d "'"
-}
-
-DB_HOST=$(parse_toml_value "host" "postgres")
-DB_PORT=$(parse_toml_value "port" "postgres")
-DB_USER=$(parse_toml_value "user" "postgres")
-DB_PASSWORD=$(parse_toml_value "password" "postgres")
-DB_NAME=$(parse_toml_value "database" "postgres")
-DB_SSLMODE=$(parse_toml_value "sslmode" "postgres")
-
-if [ -z "$DB_HOST" ] || [ -z "$DB_PORT" ] || [ -z "$DB_USER" ] || [ -z "$DB_NAME" ]; then
-    echo -e "${RED}Error: Invalid database configuration${NC}"
-    exit 1
-fi
-
-DB_SSLMODE=${DB_SSLMODE:-disable}
-
-export PGPASSWORD="$DB_PASSWORD"
-PSQL_CMD="psql -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME"
-
-if ! $PSQL_CMD -c "SELECT 1;" > /dev/null 2>&1; then
-    echo -e "${RED}Error: Cannot connect to database${NC}"
-    exit 1
-fi
-
-for migration_file in "$MIGRATIONS_DIR"/*.up.sql; do
-    if [ -f "$migration_file" ]; then
-        if ! $PSQL_CMD -f "$migration_file" > /dev/null 2>&1; then
-            echo -e "${RED}Error: Migration failed - $(basename "$migration_file")${NC}"
-            exit 1
-        fi
-    fi
-done
-
-echo -e "${GREEN}✓ Database migration completed${NC}"
-
-unset PGPASSWORD
 
+go run "${PROJECT_ROOT}/cmd/agent/main.go" migrate up