feat: update token list and Nginx configuration for Chain 138

- Added new compliant tokens including Tether EUR, Pound Sterling, and others to the DUAL_CHAIN_TOKEN_LIST.
- Updated version in the token list configuration to 1.2.
- Enhanced Nginx configuration to support token-aggregation API and serve token list and network configurations from specified paths.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/database/migrations/0014_activity_events.down.sql

@@ -0,0 +1,2 @@
+-- Rollback activity_events table
+DROP TABLE IF EXISTS activity_events;

backend/database/migrations/0014_activity_events.up.sql

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+-- Migration: Activity events feed (normalized stream for transfers + app events + bridge stitching)
+-- Description: Single table for activity feed; event_type in (TRANSFER, APP_ACTION, CLAIM, BRIDGE_OUT, BRIDGE_IN);
+-- routing.path = ALT | CCIP for bridge-aware stitching. See docs/04-configuration/ACTIVITY_FEED_SPEC.md
+-- Requires PostgreSQL 13+ (gen_random_uuid() is built-in).
+
+CREATE TABLE IF NOT EXISTS activity_events (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    chain_id INTEGER NOT NULL,
+    transaction_hash VARCHAR(66) NOT NULL,
+    log_index INTEGER NOT NULL DEFAULT 0,
+    block_number BIGINT NOT NULL,
+    block_timestamp TIMESTAMP WITH TIME ZONE NOT NULL,
+    actor VARCHAR(42) NOT NULL,
+    subject VARCHAR(42),
+    event_type VARCHAR(32) NOT NULL,
+    contract_address VARCHAR(42),
+    data JSONB,
+    routing JSONB,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    UNIQUE(chain_id, transaction_hash, log_index)
+);
+
+CREATE INDEX idx_activity_events_chain_id ON activity_events(chain_id);
+CREATE INDEX idx_activity_events_actor ON activity_events(actor);
+CREATE INDEX idx_activity_events_subject ON activity_events(subject);
+CREATE INDEX idx_activity_events_event_type ON activity_events(event_type);
+CREATE INDEX idx_activity_events_block_timestamp ON activity_events(block_timestamp);
+CREATE INDEX idx_activity_events_block_timestamp_id ON activity_events(block_timestamp, id);
+CREATE INDEX idx_activity_events_contract ON activity_events(contract_address);
+CREATE INDEX idx_activity_events_routing ON activity_events USING GIN (routing);
+
+COMMENT ON TABLE activity_events IS 'Normalized activity feed: transfers, app events, bridge in/out; routing.path = ALT | CCIP for stitch';
+COMMENT ON COLUMN activity_events.actor IS 'Wallet that initiated the action';
+COMMENT ON COLUMN activity_events.subject IS 'Optional: user/account/tokenId/resource';
+COMMENT ON COLUMN activity_events.routing IS 'Bridge stitching: { path: ALT|CCIP, fromChain, toChain, bridgeTxHash? }';