feat: TypeScript telemetry client SDK v0.1.0

Standalone npm package (@mosaicstack/telemetry-client) for reporting
task-completion telemetry and querying predictions from the Mosaic
Stack Telemetry server.

- TelemetryClient with setInterval-based background flush
- EventQueue (bounded FIFO array)
- BatchSubmitter with native fetch, exponential backoff, Retry-After
- PredictionCache (Map + TTL)
- EventBuilder with auto-generated event_id/timestamp
- Zero runtime dependencies (Node 18+ native APIs)
- 43 tests, 86% branch coverage

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/types/events.ts

@@ -0,0 +1,94 @@
+export enum TaskType {
+  PLANNING = 'planning',
+  IMPLEMENTATION = 'implementation',
+  CODE_REVIEW = 'code_review',
+  TESTING = 'testing',
+  DEBUGGING = 'debugging',
+  REFACTORING = 'refactoring',
+  DOCUMENTATION = 'documentation',
+  CONFIGURATION = 'configuration',
+  SECURITY_AUDIT = 'security_audit',
+  UNKNOWN = 'unknown',
+}
+
+export enum Complexity {
+  LOW = 'low',
+  MEDIUM = 'medium',
+  HIGH = 'high',
+  CRITICAL = 'critical',
+}
+
+export enum Harness {
+  CLAUDE_CODE = 'claude_code',
+  OPENCODE = 'opencode',
+  KILO_CODE = 'kilo_code',
+  AIDER = 'aider',
+  API_DIRECT = 'api_direct',
+  OLLAMA_LOCAL = 'ollama_local',
+  CUSTOM = 'custom',
+  UNKNOWN = 'unknown',
+}
+
+export enum Provider {
+  ANTHROPIC = 'anthropic',
+  OPENAI = 'openai',
+  OPENROUTER = 'openrouter',
+  OLLAMA = 'ollama',
+  GOOGLE = 'google',
+  MISTRAL = 'mistral',
+  CUSTOM = 'custom',
+  UNKNOWN = 'unknown',
+}
+
+export enum QualityGate {
+  BUILD = 'build',
+  LINT = 'lint',
+  TEST = 'test',
+  COVERAGE = 'coverage',
+  TYPECHECK = 'typecheck',
+  SECURITY = 'security',
+}
+
+export enum Outcome {
+  SUCCESS = 'success',
+  FAILURE = 'failure',
+  PARTIAL = 'partial',
+  TIMEOUT = 'timeout',
+}
+
+export enum RepoSizeCategory {
+  TINY = 'tiny',
+  SMALL = 'small',
+  MEDIUM = 'medium',
+  LARGE = 'large',
+  HUGE = 'huge',
+}
+
+export interface TaskCompletionEvent {
+  instance_id: string;
+  event_id: string;
+  schema_version: string;
+  timestamp: string;
+  task_duration_ms: number;
+  task_type: TaskType;
+  complexity: Complexity;
+  harness: Harness;
+  model: string;
+  provider: Provider;
+  estimated_input_tokens: number;
+  estimated_output_tokens: number;
+  actual_input_tokens: number;
+  actual_output_tokens: number;
+  estimated_cost_usd_micros: number;
+  actual_cost_usd_micros: number;
+  quality_gate_passed: boolean;
+  quality_gates_run: QualityGate[];
+  quality_gates_failed: QualityGate[];
+  context_compactions: number;
+  context_rotations: number;
+  context_utilization_final: number;
+  outcome: Outcome;
+  retry_count: number;
+  language?: string | null;
+  repo_size_category?: RepoSizeCategory | null;
+}