feat: add source hyperlinks + remove thin from-source.md

Every source reference now links to elixir-lang/elixir at commit f4e1b34.
122 hyperlinks across 11 topic files. Added PATTERN_COMPLETE sentinels.
Removed from-source.md (326 lines, shallow) — covered by existing files.

patterns/documentation.md

@@ -6,7 +6,7 @@ Patterns extracted from the Elixir standard library source code.
 
 ## 1. @moduledoc with Structured Sections
 
-**Source:** `lib/elixir/lib/gen_server.ex` lines 6–100+, `lib/logger/lib/logger.ex` lines 6–200+
+**Source:** [lib/elixir/lib/gen_server.ex#L6](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/gen_server.ex#L6)+, [lib/logger/lib/logger.ex#L6](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/logger/lib/logger.ex#L6)+
 
 **What it does:** `@moduledoc` uses a clear hierarchical structure with `##` sections covering: overview, examples, configuration, and detailed behavioral explanations. GenServer covers "Example", "Client / Server APIs", "How to supervise", "Name registration", "Timeouts", "Debugging". Logger covers "Levels", "Message", "Metadata", "Configuration" (with subsections for Boot/Compile/Runtime).
 
@@ -145,7 +145,7 @@ end
 
 ## 2. @doc with Sections and Examples
 
-**Source:** `lib/elixir/lib/kernel.ex` lines 315–335 (abs/1), `lib/logger/lib/logger.ex` lines 536–540
+**Source:** [lib/elixir/lib/kernel.ex#L315](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/kernel.ex#L315) (abs/1), [lib/logger/lib/logger.ex#L536](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/logger/lib/logger.ex#L536)
 
 **What it does:** `@doc` for individual functions includes: a brief one-liner, allowed-in-guards note (via `@doc guard: true`), explanation of edge cases, and `## Examples` with doctests.
 
@@ -230,7 +230,7 @@ def get_name(%User{name: name}), do: name
 
 ## 3. @doc since: Version Annotation
 
-**Source:** `lib/logger/lib/logger.ex` lines 539, 576, 813, 824, 831, `lib/elixir/lib/kernel.ex` line 5163+
+**Source:** [lib/logger/lib/logger.ex#L539](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/logger/lib/logger.ex#L539), 576, 813, 824, 831, [lib/elixir/lib/kernel.ex#L5163](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/kernel.ex#L5163)+
 
 **What it does:** Attaches `since: "X.Y.Z"` metadata to `@doc` indicating the Elixir version that introduced the function.
 
@@ -307,7 +307,7 @@ end
 
 ## 4. @doc guard: true Metadata
 
-**Source:** `lib/elixir/lib/kernel.ex` lines 329, 408, 428, 452, etc.
+**Source:** [lib/elixir/lib/kernel.ex#L329](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/kernel.ex#L329), 408, 428, 452, etc.
 
 **What it does:** Functions/macros usable in guard clauses are annotated with `@doc guard: true` metadata, separate from the doc string itself.
 
@@ -395,7 +395,7 @@ end
 
 ## 5. @doc false — Hiding from Documentation
 
-**Source:** `lib/elixir/lib/inspect.ex` lines 410, 417; implicit via `@impl true`
+**Source:** [lib/elixir/lib/inspect.ex#L410](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/inspect.ex#L410), 417; implicit via `@impl true`
 
 **What it does:** `@doc false` explicitly hides a function from documentation generators. Also, using `@impl true` automatically sets `@doc false` (unless `@doc` is explicitly provided).
 
@@ -555,7 +555,7 @@ end
 
 ## 7. Mermaid Diagrams in Documentation
 
-**Source:** `lib/elixir/lib/gen_server.ex` lines 14–20
+**Source:** [lib/elixir/lib/gen_server.ex#L14](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/gen_server.ex#L14)
 
 **What it does:** Embeds Mermaid diagram syntax directly in `@moduledoc` to illustrate architectural patterns (client-server message flow).
 
@@ -648,7 +648,7 @@ A simple integer counter. Call `increment/1` to add, `value/1` to read.
 
 ## 8. Admonition Blocks in Documentation
 
-**Source:** `lib/elixir/lib/gen_server.ex` lines 88–95, `lib/elixir/lib/supervisor.ex` lines 34–38
+**Source:** [lib/elixir/lib/gen_server.ex#L88](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/gen_server.ex#L88), [lib/elixir/lib/supervisor.ex#L34](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/supervisor.ex#L34)
 
 **What it does:** Uses markdown admonition syntax (`> #### Title {: .info}`) to highlight important callouts — especially for `use ModuleName` behavior documentation.
 
@@ -745,7 +745,7 @@ Helper functions for string formatting.
 
 ## 9. @doc deprecated: Soft Deprecation
 
-**Source:** `lib/elixir/lib/module.ex` lines 163–180
+**Source:** [lib/elixir/lib/module.ex#L163](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/module.ex#L163)
 
 **What it does:** Uses `@doc deprecated: "Use X instead"` for soft deprecation (documentation-only warning) vs. `@deprecated "reason"` for hard deprecation (compiler warning).
 
@@ -822,7 +822,7 @@ def process(input), do: new_process(input, [])
 
 ## 10. Callback Documentation Convention
 
-**Source:** `lib/elixir/lib/gen_server.ex` lines 584–646 (handle_call docs)
+**Source:** [lib/elixir/lib/gen_server.ex#L584](https://github.com/elixir-lang/elixir/blob/f4e1b34617ef92052b65781f18eae5b88a490098/lib/elixir/lib/gen_server.ex#L584) (handle_call docs)
 
 **What it does:** Each `@callback` is preceded by a comprehensive `@doc` that explains: what triggers the callback, what the parameters mean, every possible return value and its effect, when the callback is optional, and cross-references to related callbacks.
 
@@ -999,3 +999,5 @@ Returns `true` if the calling process is the owner of this resource.
 ```
 
 **Why:** Link references should aid navigation, not turn documentation into hypertext soup. Link types and callbacks that users might need to look up; don't link primitive types or universally known functions.
+
+<!-- PATTERN_COMPLETE -->