feat(lmtool): wire diagnostic context, retry attribution, and bump timeouts

Consumes the new telemetry contracts from the previous commit and threads them

through all 10 LMT invoke handlers. Also tunes the two session-wait thresholds

to cover the Started P95 latency observed in 30d telemetry.

Timeout tuning (driven by 30d Started latency: P50=12s / P90=67s / P95=100s):

  SESSION_WAIT_TIMEOUT:   45000 -> 120000   (eventBased path, waitForSession=true)

  SMART_POLLING_MAX_WAIT: 15000 -> 90000    (default polling path)

Previous values clipped ~10 percent of legitimate slow starts as timeouts and

biased the two strategies against each other. Aligning at 120s/90s also lets

us cleanly compare cross-strategy success rates.

Per-tool context fields (added to all 10 recordToolInvocation call sites):

  os / javaMajorVersion: from getOs() / getJavaMajorVersion()

    getJavaMajorVersion probes the redhat.java extension API (cached),

    falls back to JAVA_VERSION env var, then 'unknown'.

    classifyJavaMajorVersion handles legacy '1.8.0_xxx' -> '8' and modern '21.0.1' -> '21'.

  retryCount / previousOutcome: from nextAttempt() / completeAttempt()

    Per-window, per-tool counter. Used to test the LM auto-retry-pays-off pattern.

debug_java_application handler:

  Wraps the entire invoke in a beginDebugSessionInvocation() guard so even

  infinite hangs leave a sentinel + silentReturn trail. This is the closed-loop

  half of the 32.8 percent silent-loss bucket detected by D2 in the deep-dive.

classNameDetection rewrite:

  findFullyQualifiedClassName() now returns { className, failureReason, strategy }

  instead of string|null. The failure branch emits the new classNameDetection.failed

  event with structured strategy + failureReason so we can distinguish

  sourceDirMissing / fileNotFound / parseError / noPackageDeclaration — the

  previous boolean detected:false collapsed all four causes.

Timeout / Started events:

  debugSessionStarted.eventBased + debugSessionTimeout.eventBased +

  debugSessionTimeout.smartPolling now carry elapsedMs + thresholdMs so we can

  histogram the Started/Timeout latency distribution and verify the threshold

  bump moves the right mass.

Compiles clean (tsc --noEmit) and passes tslint.

Author: Copilot CLI