test(#4521): migrate capability subsystem batch to named timeout constants (#4627)

Batch 10 of the ad hoc timeout literal migration (epic #4445). Replaces
every bare numeric timeout/timeoutMs object-literal property in
tests/adr857-core-without-capabilities.test.cjs, tests/capability-cli.test.cjs,
tests/capability-probe-fallback.test.cjs, tests/capability-state.test.cjs,
tests/capability-trust.test.cjs,
tests/capability-validator-task-content-resolver.test.cjs, and
tests/capability-writer.test.cjs with a named constant, per
eslint-rules/no-adhoc-timeout-literal.cjs. Removes these 7 files from the
rule's allowlist.

Reuses the existing PROBE_TIMEOUT_MS constant at 8 sites across 3 files.
Adds 7 new file-local constants (no promotion to the shared helper needed
this batch -- every new class is confined to exactly one file, below the
two-file promotion bar): GSD_TOOLS_CLI_TIMEOUT_MS,
FRAGMENT_PROBE_SNIPPET_TIMEOUT_MS, INSTALLED_RUNTIME_CLI_TIMEOUT_MS,
FIXTURE_MCP_SERVER_TIMEOUT_VALUE, TASK_RESOLVER_FIXTURE_TIMEOUT_MS,
TASK_RESOLVER_TIMEOUT_CEILING_MS, and TASK_RESOLVER_TIMEOUT_CEILING_PLUS_ONE_MS
(the last two forming a boundary-coverage limit/limit+1 pair). No src/bin
file touched, no numeric value changed anywhere.

Co-authored-by: sim <sim@local>
Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

eslint-rules/no-adhoc-timeout-literal.allowlist.json

@@ -1,15 +1,8 @@
 [
   "tests/adr-612-bracket-coherence.test.cjs",
   "tests/adr-612-bracket-read-tolerance.test.cjs",
-  "tests/adr857-core-without-capabilities.test.cjs",
   "tests/assumption-delta-checkpoint-e2e.test.cjs",
   "tests/assumption-delta.test.cjs",
-  "tests/capability-cli.test.cjs",
-  "tests/capability-probe-fallback.test.cjs",
-  "tests/capability-state.test.cjs",
-  "tests/capability-trust.test.cjs",
-  "tests/capability-validator-task-content-resolver.test.cjs",
-  "tests/capability-writer.test.cjs",
   "tests/check-env.test.cjs",
   "tests/check-predicate.test.cjs",
   "tests/cjs-command-router-adapter.test.cjs",