Add WHOOSH search service with BACKBEAT integration

Complete implementation:
- Go-based search service with PostgreSQL and Redis backend
- BACKBEAT SDK integration for beat-aware search operations
- Docker containerization with multi-stage builds
- Comprehensive API endpoints for project analysis and search
- Database migrations and schema management
- GITEA integration for repository management
- Team composition analysis and recommendations

Key features:
- Beat-synchronized search operations with timing coordination
- Phase-based operation tracking (started → querying → ranking → completed)
- Docker Swarm deployment configuration
- Health checks and monitoring
- Secure configuration with environment variables

Architecture:
- Microservice design with clean API boundaries
- Background processing for long-running analysis
- Modular internal structure with proper separation of concerns
- Integration with CHORUS ecosystem via BACKBEAT timing

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

migrations/001_init_schema.down.sql

@@ -0,0 +1,6 @@
+-- Rollback initial schema
+DROP TABLE IF EXISTS slurp_submissions;
+DROP TABLE IF EXISTS team_assignments;
+DROP TABLE IF EXISTS agents;
+DROP TABLE IF EXISTS team_roles;
+DROP TABLE IF EXISTS teams;

migrations/001_init_schema.up.sql

@@ -0,0 +1,76 @@
+-- Initial schema for WHOOSH MVP
+-- Minimal subset focused on single-agent execution mode
+
+-- Teams table - core team management
+CREATE TABLE teams (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name VARCHAR(255) NOT NULL,
+    description TEXT,
+    status VARCHAR(50) NOT NULL DEFAULT 'forming',
+    task_id UUID,
+    gitea_issue_url TEXT,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    completed_at TIMESTAMP WITH TIME ZONE
+);
+
+-- Team roles enumeration
+CREATE TABLE team_roles (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(100) NOT NULL UNIQUE,
+    description TEXT,
+    capabilities JSONB,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
+);
+
+-- Team assignments - who's on what team
+CREATE TABLE team_assignments (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    team_id UUID NOT NULL REFERENCES teams(id) ON DELETE CASCADE,
+    agent_id UUID NOT NULL,
+    role_id INTEGER NOT NULL REFERENCES team_roles(id),
+    status VARCHAR(50) NOT NULL DEFAULT 'active',
+    assigned_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    completed_at TIMESTAMP WITH TIME ZONE,
+    UNIQUE(team_id, agent_id)
+);
+
+-- Minimal agents registry
+CREATE TABLE agents (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name VARCHAR(255) NOT NULL,
+    endpoint_url TEXT NOT NULL,
+    capabilities JSONB NOT NULL DEFAULT '{}',
+    status VARCHAR(50) NOT NULL DEFAULT 'available',
+    last_seen TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    performance_metrics JSONB DEFAULT '{}',
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
+);
+
+-- Minimal SLURP submissions tracking
+CREATE TABLE slurp_submissions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    team_id UUID REFERENCES teams(id) ON DELETE CASCADE,
+    ucxl_address TEXT NOT NULL UNIQUE,
+    artifact_type VARCHAR(100) NOT NULL,
+    metadata JSONB DEFAULT '{}',
+    submitted_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    status VARCHAR(50) NOT NULL DEFAULT 'submitted'
+);
+
+-- Insert default team roles for MVP
+INSERT INTO team_roles (name, description, capabilities) VALUES 
+('executor', 'Single-agent task executor', '{"code_generation": true, "task_execution": true, "git_operations": true}'),
+('coordinator', 'Team coordination and oversight', '{"team_management": true, "task_planning": true, "quality_assurance": true}'),
+('reviewer', 'Code and output review', '{"code_review": true, "quality_assurance": true, "documentation": true}');
+
+-- Indexes for performance
+CREATE INDEX idx_teams_status ON teams(status);
+CREATE INDEX idx_teams_created_at ON teams(created_at);
+CREATE INDEX idx_team_assignments_team_id ON team_assignments(team_id);
+CREATE INDEX idx_team_assignments_agent_id ON team_assignments(agent_id);
+CREATE INDEX idx_agents_status ON agents(status);
+CREATE INDEX idx_agents_last_seen ON agents(last_seen);
+CREATE INDEX idx_slurp_submissions_team_id ON slurp_submissions(team_id);
+CREATE INDEX idx_slurp_submissions_ucxl_address ON slurp_submissions(ucxl_address);