migrate time_daemon detailed design to doxygen

[ryan-steel]

Description

Migrates the detailed design docs to doxygen to match process description guidelines which state that detailed design documentation belongs in code rather than separate design artifacts.

Most unit-level diagrams removed. From implementation guidelines:

A separate static diagram per unit is not required; the unit's attributes and behaviour are documented in the source code itself as the source code is sufficiently self-explanatory and adheres to the design principles outlined in the development plan.

This is sufficient for ASIL B compliance per :need:ISO 26262-6 §8 <std_req__iso26262__software_841>, as the structural decomposition is evident from the directory layout and the component-level static view of the architecture already captures the relevant unit relationships.

Related ticket

Part of #95

[github-actions]

License Check Results

🚀 The license check job ran with the Bazel command:

bazel run //:license-check

Status: ⚠️ Needs Review

Click to expand output

[License Check Output]
Extracting Bazel installation...
Starting local Bazel server (8.6.0) and connecting to it...
INFO: Invocation ID: 669d6daa-feeb-4976-bd73-ff3cb019056d
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
WARNING: For repository 'platforms', the root module requires module version platforms@1.0.0, but got platforms@1.1.0 in the resolved dependency graph. Please update the version in your MODULE.bazel or set --check_direct_dependencies=off
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
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Loading: 
Loading: 3 packages loaded
Analyzing: target //:license-check (4 packages loaded, 0 targets configured)
Analyzing: target //:license-check (4 packages loaded, 0 targets configured)

Analyzing: target //:license-check (75 packages loaded, 10 targets configured)

Analyzing: target //:license-check (91 packages loaded, 10 targets configured)

Analyzing: target //:license-check (146 packages loaded, 2300 targets configured)

Analyzing: target //:license-check (160 packages loaded, 6137 targets configured)

Analyzing: target //:license-check (161 packages loaded, 7084 targets configured)

Analyzing: target //:license-check (171 packages loaded, 7395 targets configured)

Analyzing: target //:license-check (172 packages loaded, 9417 targets configured)

Analyzing: target //:license-check (172 packages loaded, 9417 targets configured)

Analyzing: target //:license-check (173 packages loaded, 9417 targets configured)

Analyzing: target //:license-check (176 packages loaded, 11429 targets configured)

INFO: Analyzed target //:license-check (177 packages loaded, 11555 targets configured).
[9 / 16] Creating runfiles tree bazel-out/k8-opt-exec-ST-d57f47055a04/bin/external/score_tooling+/dash/tool/formatters/dash_format_converter.runfiles [for tool]; 0s local
[12 / 16] JavaToolchainCompileClasses external/rules_java+/toolchains/platformclasspath_classes; 0s disk-cache, processwrapper-sandbox ... (2 actions running)
INFO: From Generating Dash formatted dependency file ...:
INFO: Successfully converted 2 packages from Cargo.lock to bazel-out/k8-fastbuild/bin/formatted.txt
[14 / 16] JavaToolchainCompileBootClasspath external/rules_java+/toolchains/platformclasspath.jar; 0s disk-cache, processwrapper-sandbox
INFO: Found 1 target...
Target //:license.check.license_check up-to-date:
  bazel-bin/license.check.license_check
  bazel-bin/license.check.license_check.jar
INFO: Elapsed time: 29.215s, Critical Path: 2.46s
INFO: 16 processes: 12 internal, 3 processwrapper-sandbox, 1 worker.
INFO: Build completed successfully, 16 total actions
INFO: Running command line: bazel-bin/license.check.license_check ./formatted.txt <args omitted>
usage: org.eclipse.dash.licenses.cli.Main [-batch <int>] [-cd <url>]
       [-confidence <int>] [-ef <url>] [-excludeSources <sources>] [-help] [-lic
       <url>] [-project <shortname>] [-repo <url>] [-review] [-summary <file>]
       [-timeout <seconds>] [-token <token>]