feat(analyzer): apply DetectorEmissionDefaults after every detect() call

Wires the orchestrator stamping pass into all three detect() call sites
in Analyzer.java (the main pipeline, the cache-aware runBatchedIndex
path, and the regex-fallback path). Every emission whose source is null
now gets stamped with:
  - source = detector.getClass().getSimpleName()
  - confidence = detector.defaultConfidence() (LEXICAL for regex bases,
    SYNTACTIC for AST/structured bases)

Detectors that stamp explicitly (e.g. setConfidence(RESOLVED) once a
detector migrates to ctx.resolved()) are left alone — applyDefaults
keys off source==null.

Deferred from this commit (will land with Phase 5 detector migration):
- ResolverRegistry.bootstrap(repoPath) call at the start of run() —
  pointless without detectors that consume ctx.resolved()
- Per-file ctx = ctx.withResolved(resolver.resolve(file, ast)) — same

This commit is purely additive: 2417 tests in analyzer + cli + detector
packages all pass, no regressions. The full 3555-test suite is green
post-stamping, confirming existing detector behavior is unchanged
(detectors don't stamp confidence/source today, so the stamping floor
applies uniformly).

IndexCommand also benefits transparently — it calls
analyzer.runSmartIndex() which routes through one of the wired detect
sites.

Per sub-project 1 plan Tasks 19-20 (stamping portion).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: aksOps

src/main/java/io/github/randomcodespace/iq/analyzer/Analyzer.java

@@ -11,6 +11,7 @@
 import io.github.randomcodespace.iq.detector.AbstractAntlrDetector;
 import io.github.randomcodespace.iq.detector.Detector;
 import io.github.randomcodespace.iq.detector.DetectorContext;
+import io.github.randomcodespace.iq.detector.DetectorEmissionDefaults;
 import io.github.randomcodespace.iq.detector.DetectorRegistry;
 import io.github.randomcodespace.iq.detector.DetectorResult;
 import io.github.randomcodespace.iq.detector.DetectorUtils;
@@ -1311,6 +1312,9 @@ DetectorResult analyzeFileWithRegistry(DiscoveredFile file, Path repoPath,
             }
             try {
                 DetectorResult result = detector.detect(ctx);
+                // Stamp confidence + source defaults on every emission whose source
+                // is null. Detectors that already explicitly stamp are left alone.
+                DetectorEmissionDefaults.applyDefaults(result, detector);
                 allNodes.addAll(result.nodes());
                 allEdges.addAll(result.edges());
             } catch (Throwable e) {
@@ -1514,6 +1518,8 @@ DetectorResult analyzeFile(DiscoveredFile file, Path repoPath, DetectorRegistry
             try {
                 Instant detStart = Instant.now();
                 DetectorResult result = detector.detect(ctx);
+                // Stamp orchestrator-managed confidence + source defaults.
+                DetectorEmissionDefaults.applyDefaults(result, detector);
                 long detMs = Duration.between(detStart, Instant.now()).toMillis();
                 if (detMs > 2000) {
                     log.warn("🐢 SLOW DETECTOR: {} on {}: {}ms",
@@ -1601,6 +1607,8 @@ private DetectorResult analyzeFileRegexOnly(DiscoveredFile file, Path repoPath,
                 } else {
                     result = detector.detect(ctx);
                 }
+                // Stamp orchestrator-managed confidence + source defaults.
+                DetectorEmissionDefaults.applyDefaults(result, detector);
                 allNodes.addAll(result.nodes());
                 allEdges.addAll(result.edges());
             } catch (Throwable e) {