[codex] Harden recovery issue handling (#4600)

## Thinking Path

> - Paperclip orchestrates AI agents for zero-human companies
> - The control plane must recover stranded agent work without creating
new operational loops
> - Stranded recovery issues can themselves fail, and exposing raw retry
errors in comments can leak sensitive adapter details
> - New local companies also should not force a hire-approval gate
unless operators enable that policy
> - This pull request hardens recovery issue handling, redacts retry
failure details in issue copy, preserves `maxConcurrentRuns: 1`, and
flips new-hire approval to an opt-in default
> - The benefit is safer automatic recovery and smoother default company
setup without hidden migration conflicts

## What Changed

- Added migration `0071_default_hire_approval_off` and updated company
schema/import/export/docs so hire approvals default off and serialize
only when enabled.
- Added migration `0072_large_sandman` with a partial unique index
preventing duplicate active stranded recovery issues for the same source
issue.
- Blocked failed `stranded_issue_recovery` issues in place instead of
creating nested recovery issues.
- Redacted latest retry failure details from recovery issue comments
while still linking reviewers to run evidence.
- Allowed `maxConcurrentRuns: 1` to be honored by heartbeat concurrency
normalization.
- Added focused regression coverage for recovery recursion, redaction,
migration ordering, and concurrency behavior.

## Verification

- `pnpm --filter @paperclipai/db run check:migrations`
- `pnpm exec vitest run --project @paperclipai/server
server/src/__tests__/recovery-classifiers.test.ts`
- `pnpm exec vitest run --project @paperclipai/server
server/src/__tests__/company-portability.test.ts --pool=forks
--poolOptions.forks.isolate=true`
- `pnpm exec vitest run --project @paperclipai/server
server/src/__tests__/agent-permissions-routes.test.ts --pool=forks
--poolOptions.forks.isolate=true`
- `pnpm --filter @paperclipai/server typecheck`
- `pnpm exec vitest run --project @paperclipai/server
server/src/__tests__/heartbeat-process-recovery.test.ts --pool=forks
--poolOptions.forks.isolate=true` exits 0, but this host skipped the
embedded Postgres tests with the existing init guard.
- `pnpm exec vitest run --project @paperclipai/server
server/src/__tests__/heartbeat-dependency-scheduling.test.ts
--pool=forks --poolOptions.forks.isolate=true` exits 0, but this host
skipped the embedded Postgres tests with the existing init guard.

## Risks

- Migration risk is low but this PR intentionally owns both new
migrations to avoid separate PR migration-journal conflicts.
- Recovery comments now require operators to inspect linked run evidence
for details instead of reading raw errors inline.
- The hire approval default changes behavior for newly created/imported
companies only; existing persisted company settings are not changed
except by the SQL default for future rows.

> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.

## Model Used

- OpenAI Codex, GPT-5 coding agent, tool-enabled terminal/GitHub
workflow, reasoning mode active. Context window not exposed in this
environment.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

server/src/__tests__/agent-permissions-routes.test.ts

@@ -19,7 +19,6 @@ const baseAgent = {
   adapterType: "process",
   adapterConfig: {},
   runtimeConfig: {},
-  defaultEnvironmentId: null,
   budgetMonthlyCents: 0,
   spentMonthlyCents: 0,
   pauseReason: null,
@@ -352,7 +351,6 @@ describe.sequential("agent permission routes", () => {
     mockCompanySkillService.listRuntimeSkillEntries.mockResolvedValue([]);
     mockCompanySkillService.resolveRequestedSkillKeys.mockImplementation(async (_companyId, requested) => requested);
     mockBudgetService.upsertPolicy.mockResolvedValue(undefined);
-    mockEnvironmentService.getById.mockResolvedValue(null);
     mockAgentInstructionsService.materializeManagedBundle.mockImplementation(
       async (agent: Record<string, unknown>, files: Record<string, string>) => ({
         bundle: null,
@@ -375,9 +373,6 @@ describe.sequential("agent permission routes", () => {
     mockInstanceSettingsService.getGeneral.mockResolvedValue({
       censorUsernameInLogs: false,
     });
-    mockEnsureOpenCodeModelConfiguredAndAvailable.mockResolvedValue([
-      { id: "opencode/gpt-5-nano", label: "opencode/gpt-5-nano" },
-    ]);
     mockLogActivity.mockResolvedValue(undefined);
   });