refactor(repo): consolidate openflare-server to root and move subprojects to internal/apps

- Merge all files inside openflare-server to the repository root directory.
- Relocate agent, relay, and flared subprojects from internal/ to internal/apps/.
- Combine docker-compose files and update build context paths to root.
- Update GitHub workflows and Dockerfiles to refer to new directories and package names.
- Rewrite Go package imports across all files.
- Resolve database renew test race condition and clean up docs.

internal/db/migrator/goose/clickhouse/202606190001_create_user_access_logs.sql

@@ -0,0 +1,21 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS w_user_access_logs
+(
+    id          UInt64,
+    user_id     UInt64,
+    path        String,
+    method      String,
+    ip          String,
+    user_agent  String,
+    headers     String,
+    status      Int32,
+    latency     Int64,
+    created_at  DateTime
+)
+ENGINE = MergeTree()
+PARTITION BY toYYYYMM(created_at)
+ORDER BY (created_at, ip, user_id)
+SETTINGS index_granularity = 8192;
+
+-- +goose Down
+DROP TABLE IF EXISTS w_user_access_logs;

internal/db/migrator/goose/clickhouse/202606200001_create_node_access_logs.sql

@@ -0,0 +1,20 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS of_node_access_logs
+(
+    id          UInt64,
+    node_id     String,
+    logged_at   DateTime64(3, 'UTC'),
+    remote_addr String,
+    region      String,
+    host        String,
+    path        String,
+    status_code Int32,
+    created_at  DateTime64(3, 'UTC')
+)
+ENGINE = MergeTree()
+PARTITION BY toYYYYMM(logged_at)
+ORDER BY (node_id, logged_at, remote_addr, host, path, status_code)
+SETTINGS index_granularity = 8192;
+
+-- +goose Down
+DROP TABLE IF EXISTS of_node_access_logs;