fix: remove internal Anthropic tooling from external build (#345)

Remove debug systems, employee detection, and internal logging
that have no function in a community fork.

Changes:
- Remove logPermissionContextForAnts import and calls (main.tsx, compact.ts)
  Reads Kubernetes namespace and container IDs from internal infra paths.
  Dead code for all external users.

- Remove createDumpPromptsFetch import and gate (query.ts)
  Internal prompt dump system for employee debugging.
  Replace gate with unconditional undefined — normal fetch always used.

- Remove stripSignatureBlocks ant-only block (query.ts)
  Was behind USER_TYPE === 'ant' guard, never ran for external users.

- Hardcode isAnt: false (query/config.ts)
  Employee detection flag has no place in a community fork.
  config.gates.isAnt had exactly one consumer (dumpPromptsFetch, now removed).

- Gut logClassifierResultForAnts body (bashPermissions.ts)
  Replace with empty no-op. Still called from 4 sites, zero execution.
  Remove ANT-ONLY comments describing internal security model.

- Gate status.anthropic.com behind firstParty check (errors.ts)
  429 error hint now only shown when using Anthropic directly.
  Third-party provider users see a generic capacity message.

Build: passes
Typecheck: clean (no new errors)
Tests: 196 pass, same 6 pre-existing failures unrelated to these changes

src/query/config.ts

@@ -36,7 +36,7 @@ export function buildQueryConfig(): QueryConfig {
       emitToolUseSummaries: isEnvTruthy(
         process.env.CLAUDE_CODE_EMIT_TOOL_USE_SUMMARIES,
       ),
-      isAnt: process.env.USER_TYPE === 'ant',
+      isAnt: false,
       // Inlined from fastMode.ts to avoid pulling its heavy module graph
       // (axios, settings, auth, model, oauth, config) into test shards that
       // didn't previously load it — changes init order and breaks unrelated tests.